Found no keys for decrypting Adobe Adept books
For removing DRM from your Adobe Adept books, we need some "keys" to decrypt them. And the keys are generated once your purchased Adobe Adept books are synced by Adobe Digital Editions.
Therefore, even you can read the Adobe Adept book on other reader apps like Sony, Kobo or Google Play. We still recommend you at least ensure you can read them via Adobe Digital Editions for a successful decryption. Here is the guide.
1Install Adobe Digital Editions (ADE) on your computer and authorize your computer with Adobe ID
Download Adobe Digital Editions: http://www.adobe.com/products/digital-editions.html
2Make sure you can read the EPUB/PDF books on ADE
In general, if you authorized ADE with correct account, you will be able to read Adept DRM protected EPUB books smoothly.
If the ADE told you "Error: E_LIC_ALREADY_FULFILLED_BY_ANOTHER_USER", that indicates the authorized account is not compatible with the book. If you are sure the Adobe account has no problem, please contact the eBook retailer support to bind the book to your Adobe account.
For more tips you can read this post: http://www.epubor.com/how-to-read-sonykobo-ebooks-on-ade.html
3Run Epubor software
Drag & drop Adept EPUB&PDF books from default ADE content folder to software's main window, and remove DRM.
If still fail, please open a ticket to request customer service.