1 Reply Latest reply on Feb 22, 2016 11:13 PM by Nanaky

    ADE 4.5 Error! Check Activation


      I am trying to open a library epub book in ADE 4.5, which I just downloaded.  I keep getting the message: Error! Check Activation.  I uninstalled ADE 3.0 in case that was causing a conflict, tried uninstalling 4.5 and reinstalling, rebooting, erasing the authorization and reauthorizing, but nothing has worked.  It wouldn't let me erase the authorization.  I never used to have any problem with ADE 3.0.

        • 1. Re: ADE 4.5 Error! Check Activation
          Nanaky Level 5


          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 following 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, and then 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.


          1. quit Adobe Digital Editions.
          2. Navigate to /Users//Library/Application Support/Adobe/Digital Editions and drag the activation.dat file to the trash.
            If you are using 10.7, see Access hidden library files | Mac OS 10.7 and later.
          3. Open Adobe Digital Editions and reauthorize.