Mac OS

  1. Open Adobe Digital Editions.
  2. Press Cmd-Shift-D to deauthorize Adobe Digital Editions.
  3. Select Erase Authorization.
  4. Click OK and quit Adobe Digital Editions.
  5. Navigate to /Users//Library/Application Support/Adobe/Digital Editions and drag the activation.dat file to the trash.Note:If you are unable to find the activation.dat file in Mac OS X 10.7 or later versions, see Can't see user library files in Mac OS X 10.7 and later.
  6. Open Adobe Digital Editions and reauthorize.

Windows XP, Vista, 7, 8.1, and 10 versions

  1. Open Adobe Digital Editions.
  2. Press Control+Shift+D to deauthorize Adobe Digital Editions.
  3. Select Erase Authorization.
  4. Click OK and quit Adobe Digital Editions.

Troubleshooting reauthorization and de-authorization issues on Windows

Note:

The following task requires you to modify the Windows registry. The registry contains system-related information critical to your computer and applications. Before you modify the registry, create a backup copy. Adobe does not provide support for problems that arise from improper modification of the registry.

For more information about the Windows registry or the Registry Editor, see the Microsoft Support site

If the deauthorizing process is unsuccessful on Windows, it is possible to modify the registry to remove the activation information.

  1. Close all applications.
  2. Choose Start > Run.
  3. In the Open text box, type regedit, and then press Enter. The Registry Editor opens.
  4. In the left pane of the Registry Editor, locate the registry key, HKEY_CURRENT_USER\Software\Adobe\Adept
  5. Select the Adept key.
  6. Choose File > Export.
  7. In the Export Registry File dialog box, select Selected Branch under Export Range. Enter a name and location for the backup registry key. Click Save.
  8. Right-click the Adept key and choose Delete.
  9. In the Confirm Key Delete dialog, click OK.
  10. Close the Registry Editor.
  11. Open Adobe Digital Editions and reauthorize.
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