After installing Windows 10 my DE got stuck and kept giving me error messages that it wouldn't open. So I uninstalled and then re-installed Digital Editions. But it doesn't work. When I try to return a book or remove it from my library I get the message "Adobe Digital Editions 4.0 has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available."
I have been receiving this message all along with Windows 8.1 when I have tried to return books, but I had no problem removing them from my library, so that's new.
Also, when I downloaded a new book, it disappeared into the ether. It didn't go into the Digital Editions library, so I have no way to transfer it to my Nook.