kfx removal instructions do not work

Thank you for using Epubor software. Is there any problem with your Kindle kfx books? What's the Kindle for pc or mac are you using now? If the kindle version is higher than 1.25, please follow this guide to get your problem fixed: https://www.epubor.com/faq.html#e107

If not, please contact me via  epubor.iris@gmail.com and describe your problem more clearly so that we can fix your problem.