Thank you for using Epubor software and sorry for the inconvenience caused.
Since the NOOk has changed its DRM scheme, epubor software does not support the Nook books anymore. That's why we are removing nook option from Epubor Ultimate. Once we have the solution, we will add it back.
Sorry again for the inconvenience caused.

I'm on a Windows 10 Desktop computer.
As you probably know, Nook for PC no longer works. So I've deleted the program, however the downloads directory (containing books) is still on the computer. Folder: D:\Documents\My Barnes & Noble
Most if not all of these book are key encrypted with the old B&N method of user name + credit card #.