Updated September 18, 2026: Epubor Ultimate now directly supports both Microsoft Store Kindle App(V.1.0.25218) and legacy kindle for PC.
As Amazon has moved to lock its content more tightly into its own ecosystem, Kindle KFX DRM has become the standard protection applied to nearly all new Kindle eBooks. Epubor Ultimate was the first tool on the market built specifically to remove it.
Even so, a small number of users still run into a "Kindle KFX DRM Remove failed" error — whether they're using Epubor Ultimate or another DRM removal tool. It's an understandably frustrating moment, especially if it happens on your first try. The good news is that after reviewing thousands of support cases, we've found that DRM removal failures almost always trace back to one of a handful of common, fixable causes — not a deeper flaw in the software.
This article walks through those common causes and how to fix each one with Epubor Ultimate. Use the self-check below to jump straight to the section that matches your situation.
What's Your Situation? (30-Second Self-Check)
Select your issue to jump straight to the solution:
Part 1. Check Your Kindle App / Device Version (Most Common Cause)
Amazon regularly requires the latest Kindle App version before it will let you download newly published books. If Epubor Ultimate can't support that exact version, DRM removal will fail regardless of anything else you try — so this is worth ruling out first.
Epubor Ultimate supports the Microsoft Store Kindle App, Legacy Kindle for PC (2.9.1), Kindle for Mac V.7.53 (& older versions), and select Kindle e-ink devices as of June 18, 2026.
| No. | Downloading Kindle books | Tools | Instructions for converting Kindle books |
|---|---|---|---|
| 1 | I am using Microsoft Store Kindle app / Legacy Kindle for PC | Epubor Ultimate Latest Version | How to remove DRM from Kindle books on Windows |
| 2 | I am using Kindle for Mac | Epubor Ultimate Latest Version | How to remove Kindle DRM on Mac (v.7.53 and older) |
| 3 | I am using Mac with Kindle for Android | Epubor Kindle Converter | Remove DRM using Kindle for Android on Mac |
| 4 | I am using Kindle e-ink device | Epubor Ultimate Latest Version | Remove DRM from Kindle e-ink device |
1. Remove DRM from Kindle books on Windows (Microsoft Store Kindle app or Legacy Kindle for PC)
Legacy Kindle for PC still works. In addition, Epubor Ultimate now fully supports the new Kindle for Windows app.
Here are the available solutions for different Kindle app users.
|
Before removing Kindle DRM, make sure you know how you downloaded your Kindle books. Click "Kindle" tab at the left side if you download your kindle books via kindle for Windows(MS Kindle) or click "Legacy kindle" icon at the top right corner if your kindle books are downloaded via legacy kindle.
Then remove Kindle DRM with the latest version of Epubor Ultimate.
2. Remove DRM from Kindle books with Kindle for Mac (Mac with Apple Silicon Supported)
Epubor Ultimate fully supports Kindle for Mac V.7.53 (and older versions) on Mac with Apple Silicon. The most reliable approach on Mac is to download your books through Kindle for Mac first, then remove the DRM with the latest version of Epubor Ultimate on Mac.
3. Remove DRM from Kindle books on Mac with Kindle for Android (Apple Silicon Compatible)
Epubor Kindle for Android Converter is designed to remove DRM on Mac with Apple Silicon. If other desktop methods fail, try Epubor Kindle Converter — dedicated to handling Kindle books via Android app emulation on Mac. You can follow the Epubor Kindle Converter user guide to complete the removal.
4. Remove Kindle DRM with Kindle e-Ink Device
Check Your Kindle Firmware Version First
Before trying to remove DRM from books downloaded directly from a Kindle device, please check your Kindle's firmware version. Epubor Ultimate currently supports only a limited number of Kindle e-ink devices and firmware versions.
Kindle devices running firmware 5.18.5 or later are not supported. The following firmware versions are also not currently supported:
- 5.18.2.1.1
- 5.18.1.1.1
- 5.16.2.1.1
Books downloaded on Kindle devices with these firmware versions carry stronger DRM and cannot currently be processed by Epubor Ultimate. Supported older devices include Kindle Paperwhite 2, Kindle Voyage, and Kindle 3.
If your Kindle device is not supported, we recommend downloading your Kindle books through Kindle for PC or Kindle for Mac instead.
Step 1 Download Kindle books to your Kindle e-Ink device completely (100% progress).
Step 2 Connect your device via USB, launch Epubor Ultimate, and drag books from the left column to the right panel.
Step 3 Click "Decrypted" or open the output folder to access your DRM-free books.
Part 2. Quick Kfx Error Code & Symptom Reference
Jump straight to your specific error message or symptom (ordered by frequency of occurrence):
| Error / Symptom | Jump to Fix |
|---|---|
| Worked before, broke right after a Kindle app update | Kindle App Version Updated |
| Error appeared after changing Kindle save path or enabling OneDrive | File Save Location / OneDrive Issues |
| Windows 11 saves new content to a D:/E: drive instead of C: | Secondary Drive Storage Issue |
| DRM removal fails with multiple Windows user accounts on the same PC | Multiple User Accounts |
| Book shows as a random code (e.g. B0FPKBNH6C_EBOK) instead of title | Kindle Book Name Display Issue |
| "KFXKeyExtractor.exe Application Error (0xc000007b)" | 0xc000007b Application Error |
KFX Error 1Kindle App Updated Automatically to an Unsupported Version
Updated 9/16/2026: The latest version of Epubor Ultimate fully supports Kindle for Windows Version 1.0.25218.
The Kindle desktop app updates frequently in the background. If DRM removal worked previously but suddenly fails, your Kindle app likely updated past what your current version of Epubor Ultimate supports.
Solution 1. Use Legacy Kindle for PC 2.9.1 with Epubor Ultimate latest version:
| Download Legacy Kindle for PC 2.9.1 here |
Solution 2. Downgrade your Kindle app: Follow our step-by-step guide to downgrade Kindle for PC/Mac to a working supported build while our team updates compatibility.
KFX Error 2Kindle for Windows: Change Kindle File Location?
Sometimes, a KFX error may occur after changing the Kindle file location in Kindle for Windows. In this case, please follow the steps below to fix the error.
How to Fix It:
1 Log out of your Kindle for Windows app first.
2 Download your Kindle books again. Do not change the Kindle file location.
3 Go to Users >> Settings >> Kindle, select Set to Default, and click the OK button. Then, return to the main interface and drag your Kindle books to the right side again to remove the DRM.
KFX Error 3Windows 11 Default Save Location Configured to Secondary Storage (D: or E: Drive)
When Windows 11 is configured to automatically store new application data or downloads on a secondary drive (such as a D: or E: partition), it changes system path permissions in ways that can prevent Epubor Ultimate from reading Kindle application keys correctly.
1 Open Windows Settings (Press Windows key + I) > System > Storage > Advanced storage settings > Where new content is saved.
2 Change "New apps will save to:" back to Local Disk (C:) and click Apply.
3 Uninstall both the Microsoft Store Kindle App and Epubor Ultimate, then perform a clean reinstallation on your C: drive.
KFX Error 4Multiple Windows User Accounts on One Computer
If your computer has multiple active user profiles, Epubor Ultimate may lack permission to read local decryption keys generated under a different user session.
Solution: Right-click the Epubor Ultimate desktop icon and select Run as administrator. If failures persist, uninstall Epubor Ultimate and perform a fresh install under your PC's primary Administrator account.
KFX Error 5Kindle Book Name Display Issue (e.g. B0FPKBNH6C_EBOK)
When a newly downloaded Kindle book displays in Epubor Ultimate as a random character string (like B0FPKBNH6C_EBOK) instead of its real title, the software hasn't correctly parsed the book's metadata headers yet.
1 Close the Kindle desktop app completely.
2 Ensure the eBook has finished downloading completely inside your Kindle library (progress must show 100%).
3 Restart Epubor Ultimate — the book list will refresh and render proper title names.
KFX Error 6Application Error: The Application Was Unable to Start Correctly (0xc000007b)
This error code (0xc000007b) indicates a system component conflict — specifically, a missing or corrupted Microsoft Visual C++ Redistributable runtime environment required by Epubor Ultimate's KFX extraction module.
How to Fix It:
1 Download and install the official Microsoft Visual C++ Redistributable (x86) package directly from Microsoft.
2 Restart your computer after installation completes.
3 Re-launch Epubor Ultimate and attempt the DRM removal again.
Part 3. Special Book Restrictions & Cache Issues
Beyond standard software or environmental configuration issues, failures can occasionally stem from strict textbook DRM protections or corrupted application cache files:
1. Kindle eTextbooks (Higher Education Digital Textbooks)
While standard purchases, samples, rentals, and Kindle Unlimited books are supported, certain high-education digital eTextbooks use unique, publisher-restricted DRM frameworks that cannot currently be decrypted by Epubor Ultimate.
2. Corrupted Local Application Cache or Key Registry
Temporary key files or cached registration index entries can occasionally become corrupted following system crashes or interrupted software updates. Clearing these manually restores normal decryption behavior:
On Windows:
1. Navigate to C:\Users\username\AppData\Roaming\.Ultimate and delete the folder contents.
2. Delete the key index directory located at C:\Users\username\.Epubor_Keys.
3. Re-launch Epubor Ultimate, delete your previously downloaded book files in your Kindle desktop app, re-download them, and attempt conversion again.
Part 4. Get Assistance from Epubor Support Team
Epubor provides direct technical support for all registered and trial users. If the self-check steps above do not resolve your DRM removal failure, please send an email to epubor.service@gmail.com.
Our support team will review your case log files and respond within 24 hours.
Iris Yan Marketing Architect at Epubor since 2017, drives the brand’s product design, advertising, and all-channel strategy.
Please ensure you install the latest version of Epubor Ultimate. Also, please ensure the Epubor Ultimate is running while you are downloading the kindle books. Then try to remove drm again.
If you are still failed, please screenshot and send them to us via support@epubor.com.
I downgraded Kindle to the older version but still could convert 3 of the Kindle books to PDF. Help, please.
I sent diagnostic from cao.tuyet.van@gmail.com with the error messages earlier.
Thanks,
Julie
I am a Macbook user. Though your app is quite convenient for me, it can only convert half of the book or less.
I copy the kfx file from my kindle and try to convert it into pdf....but I can only convert half of the book
Are you using the trial version of Epubor software? The trial version only can save 20% content of each book. If you want to convert the whole book, please purchase the licensed version.
If you are using the licensed version, please contact our customer service support@epubor.com to about your issue. Our technique staff will help you fix this issue.
As of today (December 26, 2018) the Epubor will not unlock KFX files with the newest Epubor version, and also Kindle for PC v.1.24
Even with these versions, Epubor no longer unlocks Kindle KFX files. We've tried many times.
Now what...?
I hope your team keeps working and finds a solution we can all use against Amazon's over-dominant control. I don't know if it's possible to clean our files of unwanted DRM. But I hope you continue to try, and succeed.
Thank you!!
Sorry for causing you so much inconvenience.
1, Epubor team now has been working working on resolving this issue for a long time. Once resolved well we will release a new version and publish it soon on our official site ASAP.
2, This is really a serious problem especially for all our customers. It may take time but please be patient. The downgrading solution is the current one, and the unique.
3, Nobody could help fix this with a faster or better method than downgrading. Calibre too.
Thank you for asking. Have you ever used Epubor Ultimate to remove kindle drm before mac os 10.15? If yes, you can still use Epubor Ultimate as this article instructed: https://www.epubor.com/remove-kindle-drm-on-macos-1015-catalina.html#part1
Otherwise. you can choose other method as the above article instructed.
Thank you for using Epubor software. We are sincerely sorry for this issue.
1. Are you using the mac catalina system? If yes, please us epubor kcr converter to remove kindle drm and convert kindle books to any format. Here is the guide:https://www.epubor.com/kindle-cloud-reader-to-epub-mobi-azw3.html
2. If your books are textbook, it will not be downloaded with old kindle app or even kindle cloud reader. Then our software will not help you in this case.
For more information, please contact support@epubor.com get the further assistance.
Are you using the latest version of Epubor Ultimate?
If yes, but still failed, can you please send the screenshot to me via epubor.iris@gmail.com?
Then I will try my best to help you fix it.
Sign in fails on 1.17 Kindle Windows app fails.
Therefore one cannot sync - download the ebooks from amazon in the first place to be able to convert them.
Sign in fails because even with valid username and password, v1.17 says invalid username or phone number.
Hi, i have the same problem
do you solve it ? if it is a yes....how ??
bregards
This worked and was explained perfectly. I get why all they gyrations. I tried for four hours to find a way to print a kindle ebook that I paid .99 for because it's a workbook.
I want an author to get their $$. After I have bought the book, it's mine.
Thank you
Thank you for your message and we are sincerely sorry for this issue.
Now we are working on this issue. Once there is a solution, we will let you know. The older kindle books still can be cracked with Epubor Software.
There is still another way to remove drm from this kind of kindle books if you have any kindle eink device registered with your amazon account. Please download the kindle books via "Download and transfer via usb" and then remove kindle drm with Epubor Ultimate. Here is the detailed guide: https://www.epubor.com/how-to-remove-drm-from-kindle-kfx-ebooks.html#meth4
Now we are working on this issue. Once there is a solution, we will let you know. The older kindle books still can be cracked with Epubor Software.
There is still another way to remove drm from this kind of kindle books if you have any kindle eink device registered with your amazon account. Please download the kindle books via "Download and transfer via usb" and then remove kindle drm with Epubor Ultimate. Here is the detailed guide: https://www.epubor.com/how-to-remove-drm-from-kindle-kfx-ebooks.html#meth4
We are sincerely sorry for this issue, but there is no way to crack the new kindle kfx format. That's why we provide the workaround here.
For the kindle 1.39 issue, we aware of this issue. Now we are working on this issue. Once there is a solution, we will let you know. The older kindle books still can be cracked with Epubor Software.
There is still another way to remove drm from this kind of kindle books if you have any kindle eink device registered with your amazon account. Please download the kindle books via "Download and transfer via usb" and then remove kindle drm with Epubor Ultimate. Here is the detailed guide: https://www.epubor.com/how-to-remove-drm-from-kindle-kfx-ebooks.html#meth4
would have saved me sometime before I deleted your program.
It seems the amazon kindle has changed something in the new published kindle books. It requires the latest kindle app to download it.
Now we are working on this issue. Once there is a solution, we will let you know. The older kindle books still can be cracked with Epubor Software.
There is still another way to remove drm from this kind of kindle books if you have any kindle eink device registered with your amazon account. Please download the kindle books via "Download and transfer via usb" and then remove kindle drm with Epubor Ultimate. Here is the detailed guide: https://www.epubor.com/how-to-remove-drm-from-kindle-kfx-ebooks.html#meth4
We are now working on some alternative solutions. Once there is any progress, we will let you know.
yes only have
Mark as Read
Clear Furthest Page Read
Read Now
Add or Remove from Collection
Gift Now
Manage Family Library
I did what you said about getting the older Kindle for PC and downloaded my book. Got the error from your Epubor but then it occurred to me that maybe I just needed to download the updates for it and sure enough, that fixed the error and I got to convert it to PDF. Didn't even have to use Calibre and that was great.
So I thank you from the bottom of my heart for letting me take possession of the book I purchased rather than have it on loan from Amazon.
Blessings.
I buy Kindle books from Amazon with my PC. I convert them with your Epubor software to PDF, then sidload it to my Samsung Galaxu S2 tablet, where I read it with Moon Reader. I buy a LOT of books, although I haven't bought any since the new year, because of an expensive car repair. I just bought several ebooks from Amazon tonight, and was going to buy quite a number more in the next month... I've been doing this for several years.
(I belong to FOUR book groups. I promote your software at each of them all of the time!)
Tonight, after I bought these books, and had got themdownloaded to my PC,I found I couldn't convert them, as I usually do. Your software had told me that it needed and update from you, so I had downloaded it. When it still couldn't convert, even when I did the "earlier version" thing, I went to your website, wondering if there were special instuctions with your software update. To my horror and disgust, I found that it looks like Amazon has come up with a way to keep your software from being useful unless I have a Kindle myself. Well, I don't; the whole point of buying your software (AND RECOMMENDING IT TO EVERYONE I KNOW) was to keep some distance from Amazon, which is already making things/books obsolete.
The question I have for you now is: do you anticipate being able to come up with an updated version of your software sometime in the next year that will crack the new DRM version without needing a kindle intermediary?
Thank you. - Keith
Please confirm: If I want to buy Kindle device today (March 2023), I can use it to download books published after January 2023 and epubdor will be able to decrypt the books?
If this is true, can you give me a list of which Kindle devices will work for this purpose (basic $99 Kindle? Paperwhite? Oasis?)
Thank you for your time and assistance!
For new books published after Jan,2023 if you don't have an e-ink device, I'm sorry that it doesn't work. If you have a Kindle eink device registered to your Amazon account, you could use Epubor ultimate to remove DRM for new books.
Hello,
Almost all the books downloaded via USB can be decrypted by our software. Some books don't have DRM, so there is no green decrypted check on the right part, you can directly open the book. Please try again.
If there is still the same problem, could you please allow me to connect your desktop with TeamViewer software to check and solve your problem directly?
Download TeamViewer: https://www.teamviewer.com
When you are running the TeamViewer, please tell me your "Your ID", and "Password", then we can connect to your desktop.
Please contact us via support@epubor.com. We're willing to help you solve your problems.
Hello,
Thanks for your comment. We were aware of this issue.
For the ebooks published in 2023, here is still another way to remove DRM if you have any Kindle device (Kindle fire or kindle eink device) registered with your Amazon account.
Please download the Kindle books via "Download and transfer via usb" and then remove kindle drm with Epubor Ultimate.
Here is the detailed guide: https://www.epubor.com/how-to-remove-drm-from-kindle-kfx-ebooks.html#meth4
If there are other questions, please feel free to contact us.
Best regards,
Epubor Team
Hello,
Thanks for your message. May I ask if the books not available for download and transfer via USB is from Kindle Unlimited?
Kindle Unlimited is a rental service, so you don't actually own the books. Therefore, Epubor software can't convert Kindle Unlimited books for you.
If there are other questions, please feel free to contact us.
Best regards,
Epubor Team
Then I have a second question: does this process of yours only work if you have a Kindle device? That is, if I have the Kindle app installed on an android phone, the procedure for removing the protection cannot happen?
Hello, thanks for your message.
If you don't have a Kindle device, you need to install the Kindle app for desktop on your Windows or Mac computer. And download the Kindle books through the app to your computer. Then you can install and run our software Epubor Ultimate on your computer, and next drag and drop the downloaded books to the software to decrypt and convert the books to another format you need.
If you only have installed the Kindle app on an Android phone, it's impossible to download the Kindle books and transfer them to your computer. So you can not decrypt and convert the books via our software.
If there are other questions or concerns, please feel free to contact us.
Best regards,
Epubor Team
If you have a kindle device, please download the book via "Download and transfer via usb' and then remove drm with Epubor Ultimate.
If you don't have the kindle device, please use the kindle converter to handle the new kindle books.
There two methods are both mentioned in this article. Please have a try.
As I already said, I tried the option mentioned and it did not work. I do not own a Kindle device so the first option is out. The second option simply doesn't work anymore. Using an older Kindle-for-PC version doesn't download newer books. The current Kindle-for-PC downloads in KFX-ZIP and AZW and your program cannot DeDRM and convert them.
Hello,
Thanks for your message.
If you don't have a Kindle e-ink device, we recommend our new product Kindle Converter to decrypt and convert the Kindle books published in 2023. please learn more here:
https://www.epubor.com/kindle-converter.html
User guide: https://www.epubor.com/kindle-converter-user-guide.html
If there are any other questions, please feel free to contact us.
best regards,
Epubor team
Let me know
Regards
Hello there,
As Faspao stated, I on the day purchased a lifetime Epubor Ultimate license to remove DRM, as I am not a Kindle user. I don't see the point of buying additional software that is not a lifetime license for a service I should have if Epubor Ultimate is updated with a version that allows converting Kindle books to Epub, as that is why I paid for the program a lifetime purchase back on the day.
I understand that updates are costly as it requires to workaround new problems, but I just think this is not fair for the people who purchased an Epubor Ultimate lifetime, so I think it should be offered a great lifetime discount for the old users of Epubor Ultimate.
Best regards,
Hello,
Thanks for your comment.
If you're Epubor Ultimate lifetime user, please contact us via support@epubor.com for new license of Kindle Converter.
Best regards,
Epubor Team
Hi,
Kindle Unlimited is a rental service, so you don't actually own the books. Therefore, Epubor software can't convert Kindle Unlimited books for you.
Any other questions or concerns, please feel free to contact us.
Best regards,
Epubor Team
Hello, thanks for your message.
If you don't have Kindle device, the Epubor Ultimate can't deal with new Kindle books in 2023. Our Kindle Converters helps people who don't have Kindle device to decrypt their new Kindle books.
Any other questions or concerns, please feel free to contact us.
Best regards,
Epubor Team
Hello,
Thanks for your comment. I'm glad that our software can help you.
Any other questions or concerns, please feel free to contact us.
Best regards,
Epubor Team
I think for users who bought the lifetime Ultimate product we should be given a free lifetime key for the Kindle converter which works for converting the kfx kindle books after Jan 2023. I think it's really cheeky to ask for people to pay for another piece of software when Ultimate doesn't work anymore and also your workaround with download via usb from kindle device is cumbersome and not what the Ultimate sw was supposed to work like
. Why are you still selling the Ultimate software when is blatantly not working after Jan 2023?
Hello, thanks for your comment
Do you still have problem with Epubor Ultimate? Now the latest version of Epubor Ultimate supports decrypting and converting Kindle books, including newly published books in 2023.
If you still have problem, please feel free to contact us via support@epubor.com.
Best regards,
Epubor Team
Hello, thanks for your comment
I'm really sorry that your problem is still not solved.
The new version of Epubor Ultimate will automatically decrypt your Kindle books as EPUB files. But if you want to convert them to Mobi or AZW3 format, you need to add the DRM-free epub book to Epubor Ultimate and select the output format, then click the button "Convert to XXX" to convert your books to AZW3 or Mobi. Please try again, thank you!
If you still have the same issue, could you please provide a screenshot to show your specific problem and contact us via support@epubor.com. We will help you solve your problem as soon as possible.
Best regards,
Epubor Team
Hello,
Thanks for your comment. I'm really glad that our software can help you.
Any other questions or concerns, please feel free to contact us via support@epubor.com.
Best regards,
Epubor Team
I tried to convert E-books from Kindle for PC and from the Kindle (11. Generation) E-book reader connected via USB.
The books are visible in the left window. All the older ones drag to the right window, but when I drag the most recently purchased one (25.Sept 2023) the progress message "The program is removing the D.R.M. encryption. Please wait for this to finish." stays for ever and the program is locked. Can only close with Task Manager.
Hello, thanks for your message
I suggest you use 2.0 Kindle for PC to download your books and remove DRM with Epubor Ultimate. If your Kindle firmware is higher than 5.10.2, our software does not support to drag and drop the books from the Kindle e-reader connected to your computer.
If there are any questions or concerns, please feel free to contact us via support@epubor.com.
Best regards,
Epubor Team
Hello, thanks for your comment
If you have any questions about Epubor Ultimate, please feel free to contact us via support@epubor.com.
Best regards,
Epubor Team
Hello, thanks for your comment
Please Note: The free trial version of Epubor Ultimate only helps you decrypt and convert 20% of the books in TXT format (images not included). Once you purchase the software and register it with your license, you will get the complete book converted with all the images and in the proper format you want like PDF/Epub/Mobi/AZW3/TXT.
If you're interested in Epubor Ultimate, please feel free to contact us via support@epubor.com, and we can offer you an exclusive discount.
Best regards,
Epubor Team
I tried using a new version Epubor Ultimate (3.0.16.105) + Kindle For PC 2.0 to remove DRM, but after removing DRM, the PDF e-book lost its table of contents. Everything is OK when using old Epubor Ultimate.
What's the old version of Epubor Ultimate you are using?
The e-books decrypted by Epubor are directly in PDF format without conversion, so it is speculated that the original format of these books is PDF. for example:
Amazon UK ISBN: 978-1782949169
But the PDF e-book lost its table of contents If using the new version of Epubor.
Do you obtain the books from kindle unlimited or purchase them?
Please screenshot the error message and send it to us via support@epubor.com. Then we will check what's the problem. Also, please ensure you are using the correct kindle version.
Currently, please use "download and transfer via usb" to download your kindle books and then remove drm if you have a kindle eink device.
If you have a Windows computer, please just download kindle books via kindle for pc.
Any more problem, please feel free to contact us.
I tried the download and transfer via usb, and I get "Kindle DRM removal failed!" so that doesn't work either
If you are still failed, please feel free to contact us via epubor.michelle@gmail.com to get further assistance.
it seems the update removed the serial number, because I had it there before
the error message was completely wrong. It should have said just that - "please insert your kindle serial number" instead of some random unrelated and confusing madness
Hello,
I used the latest version of epubor ultimate trial and Kindle For PC 2.4.0.
I tried to remove the drm from one of my ebooks, and then convert it to epub, but after the conversion the formatting and images of the ebook were lost.
Does the paid version retain images and formatting after book conversion?
Thanks
Vincenzo
Please note that the trial version has certain limitations. It only converts 20% of each book's content and does not retain the original formatting or images. To access the full content and preserve the original formatting, we recommend using the licensed version of Epubor Ultimate.
Yes, Kindle for PC 2.4.0 will no longer be able to download Kindle books published after April 22, 2025.
If you have a Kindle device, you can still download these books directly to your device and then remove DRM using Epubor Ultimate.
We are currently working on a solution for this issue and will notify you as soon as we have any updates.
Thank you for your patience!
Has your team developed a fix for the latest version of Kindle and DRM? Todays date is June 6th 2025.
Okay so how far away is Epubor from coming up with a fix for the latest kindle DRM ?
Then download kindle books via Kindle for pC2.8.0.
Then try to remove drm again. If you fail again, please contact us via livechat to get further assistance.
EPUBOR Ultimate v3.0.16.671 (with paid license)
Kindle for Windows 1.0.22326
Already reinstalled the vcredist_x86 (as admin)
Opened kindle as administrator (kindle app was installed as admin too)
Downloaded a book I bought (ie not unlimited nor prime).
Able to see the text in Kindle app. Folder appears in default kindle directory
opened epubor as admin (installed as admin too)
epubor sees the downloaded book at left (w correct name)
but will not De-DRM when I drag it over. No green checkmark. Stays an orange lock "Kindle KFX"
error message says:
KFXKeyExtractor.exe "The application was unable to start correctly (0xc000007b)
EPUBOR Ultimate v3.0.16.671 (with paid license)
Kindle for Windows 1.0.22326
Installed and open Epubor Ultimate as admin after kindle update 14/8/26
but will not De-DRM when adding it. No green checkmark, stays an orange lock "Kindle KFX"
DRM removal not working after kindle app update 12 Aug 2026
EPUBOR Ultimate v3.0.16.671 (with paid license)
Kindle for Windows 1.0.22326
Have reinstalled both EPUBOR and Kindle for Windows
Have run EPUBOR as administrator
Still unable to remove DRM
EQUBOR Ultimate v3.0.16.671 (with paid license)
Kindle for Windows 1.0.22326
Already reinstalled the vcredist_x86 (as admin)
Opened kindle as administrator (kindle app was installed as admin too)
Downloaded a book I bought.
Able to read the book in Kindle app. Folder appears in default kindle directory
opened epubor as admin (installed as admin too)
epubor sees the downloaded book at left (NOT with the correct name / as azw File)
but will not De-DRM when I drag it over. No green checkmark. Stays an orange lock "Kindle KFX"
error message says:
Kindle KFX > Right-cklick start as Admin......
If you fail again, please send us the epubor log via epubor.service@gmail.com so that we can check this issue further. You can find the epubo log here: C:\Users\yourcomputerusername\EpuborLog
EPUBOR Ultimate v3.0.16.685 (with paid license)
Kindle for Windows (11) 1.0.22326
The book i try to unlock as still No green checkmark. It Stays with an orange lock "Kindle KFX" It says that I can try with running as administrator, but it dosen't work anyway
Could you please send us your latest log file to support@epubor.com? It should be the August log, and you can find it at the following path:
%USERPROFILE%\EpuborLog
How does this work as you are contradicting yourself. First you tell us that the new versions of Kindle for Mac/pc are not useable then this.
'If your Kindle firmware has been updated to version 5.18.5 or later, you won’t be able to remove DRM from books downloaded via these devices because they are encrypted with a stronger Kindle DRM. IN THIS CASE, PLEASE DOWNLOAD KINDLE BOOKS VIA KINDLE FOR PC/MAC TO REMOVE KINDLE DRM.'
Which is it and does this actually work now? The old versions of kindle are blocked as they WILL NOT download unless updated. The direct Kindle to Mac does not decrypt and I am using the latest Epubor Ultimate.
Come on Epubor. You used to be a great solution but now you are being contradictory and are clearly setting out to confuse loyal users with your inconsistent guidelines.
Could you let us know your operating system — Windows or Mac? If Mac, which chip (Intel or Apple Silicon)?
We're unable to find any order associated with this email address.
Could you send us a screenshot of the error message so we can take a closer look?
the following error appears:Good afternoon! I’ve tried everything, but I can't seem to remove the Kindle KFX DRM. I even tried running it as an administrator, but nothing works—I keep getting the same error: Right-click Epubor Ultimate icon, select Run as administrator, and try removing the Kindle DRM again.
Failed files: C:\Users\pablo_ridv1am....
MY Epubor is: v3.0.16.692
Hi,
Latest version of epubor, on the 31.08.2026, and latest version of kindle for PC. Run as administrator, installed as adminitrator, restarted PC. It does not work. Gues Amazon has done someting again,
Also, Epubor does not se the default directory for Kindle for PC, it now seems to be: C:\Users\ander\AppData\Local\Packages\AMZNKindle.AmazonKindleReadingApp_m1sc522ngdk36\LocalState\Classic\Content
And when I point Epubor there, it sees the folders of each book, and when choosing that, an *.azw file. When choosing that one gets the usual KFX error.
What to do?
All the best,
Anders H.
this stopped working again today KFX error Kindle 1.0.23.620, epubor 3.0.16.392
Me same dass kfx bei gar keinen Buch mehr geht..
Für epubor service muss das eine Zumutung sein alle 3 bis 4 Tage neues update zu bringen.. amazon erklärt hier kräftig den krieg..
Wird es eine lösung geben? Danke für euren Service
Give it a try.
Since then your program is competely bad. It cant remove drm from Amazon books.
Money waste without solutions of your side.
I have tested versions 636, 638, 683 and 730.
Always the same problem. Kindle KFX error.
Fix the problem or cease stealing us the money.
Can you please take a screenshot of the error message and send it to us via support@epubor.com so that we can check this issue further.
Please ensure you are using the correct kindle for windows version1.0.25218. If not, please uninstall it and reinstall it here: https://apps.microsoft.com/detail/9p8jq0jjstll?hl=en-US&gl=US
If you fail again, please send us the epubor log via epubor.service@gmail.com so that we can check this issue further. You can find the epubo log here: C:\Users\yourcomputerusername\EpuborLog
Oben rechts wird auf rot angezeigt: Kindle KFX
In der Fehlermeldung wird ebenfalls angezeigt: Kindle KFX
Die UMWANDLUNG scheint nicht zu funktionieren.
If you fail again, please send us the epubor logvia epubor.service@gmail.comso that we can check this issue further. You can find the epubo log here: C:\Users\yourcomputerusername\EpuborLog
your latest version is not working properly. it is just removing first 2 books drm and then stuck for hours i wait and its keep processing. then evan we cannot close app in this stage and i have to close app from task manager and then reopen the app but it is not removing drm and just keep processing. then restart windows and tried again but still the same issue.
i am using kindle for windows 1.0.25218
and epubor ultimate 3.0.16.741
i am using kindle for windows 1.0.25218
and epubor ultimate 3.0.16.741
i am using kindle for windows 1.0.25218
and epubor ultimate 3.0.16.741
I have reinstalled epubor, kindle for windows, and have restarted the computer.
I have followed the steps above and like others converting is very tedious and gets stuck on processing when it works. Then today I try to load books from Kindle content folder and there's nothing in all the folders in Kindle content.
It is not an us problem. Amazon has yet again changed DRM and it needs to be reconfigured again. It worked last week fine but not today.
Thank you for your comments. Please send us the epubor log via epubor.service@gmail.com so that we can check this issue further. You can find the epubo log here: C:\Users\yourcomputerusername\EpuborLog