Please try to do the following again. I haven't seen any problems with the following solution yet:

1. Uninstall the new version of ADE
2. Delete the ADEPT folder in the Registry.
   HKEY_CURRENT_USER>Software>Adobe>ADEPT
3. Delete the "My Digital Editions" folder in "My Documents".
4. Reboot computer.
5. Re-install the old version provided in the link below
   
   Code:

   http://drop.io/a1bdxlq

   (check for viruses)
6. Reactivate ADE.
7. Run the Ineptkey again to obtain the Adeptkey.der.
8. Then you should be good to go.

Some users even tried the update again, and still were able to remove DRM.