Unable to open ADE 4.5 and epub files

[markb20343226]

I have a problem with Adobe Digital Editions (4.5.4) in Windows 10.  When I try to open ADE, an icon appears on the taskbar with a blue line (showing it is active), but ADE does not appear on the screen.  This happens however I try to turn it on, e.g. from the start menu, from a screen icon, or by right-clicking on an epub book in 'My Digital Editions' and telling the computer to open it using ADE.  If I try to open an epub (e.g. welcome.epub) and hover over the ADE icon on the taskbar, a thumbnail of the epub appears, but clicking on it just makes the thumbnail disappear.  When I then right-click on the ADE icon and tell it to close the window, a dialog box appears with the message (which I don't understand): "welcome.epub is not open from library, would you like to copy it to library?"  I have tried uninstalling and reinstalling ADE.

Has anyone else had this problem?  How can I get Adobe Digital Editions to open properly so that I can read my epub files?

[Nanaky]

Has you check it with right-click and run as admin?

[markb20343226]

Thanks for the suggestion — I tried doing as you suggest, but it made no difference.

[Nanaky]

Has you try a older version of Digital Edtion? (3.0):

http://www.adobe.com/support/digitaleditions/downloads.html

[markb20343226]

No, this is the only ADE version I have. I uninstalled the earlier edition when I updated to 4.5.

[Nanaky · Accepted solution]

The Version 4.5 has any problems. Better you uninstall it and install again 3.0.

[markb20343226]

Thanks! That has worked.

[Nanaky]

You are welcome.

[Elizabeth Schatz]

I can't get the download on the Adobe website for 3.0

[mohammeds35058324]

Thank you for your support , I had the same issue and make above steps , but when add a eBook link the program tell me message ( error check activation ) . please advise .

[Nanaky]

Windows:

    Close all applications.

    Press WINDOWS + R.

    In the Open text box, type regedit and then press Enter. The Registry Editor opens.

    In the left pane of the Registry Editor, locate the following registry key: HKEY_CURRENT_USER\Software\Adobe\Adept

    Remove the Adept Folder.

    In the Confirm Key Delete dialog, click OK.

    Close the Registry Editor.

    Open Adobe Digital Editions and reauthorize..

Macintosh:

    quit Adobe Digital Editions.

    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 https://helpx.adobe.com/x-productkb/global/access-hidden-user-library-files.html

    Open Adobe Digital Editions and reauthorize.

[alancsalt]

That registry procedure didn't work.

I have Ebooks downloading from Kobo set to open with Adobe Digital Editions. (4.5.10)

Lately, it has stopped opening them. Instead I get a message:

"Unable to open X

Errors were encountered in this item"

Reinstalling and updating didn't help.

Took the advice to revert to 3.0 - http://download.adobe.com/pub/adobe/digitaleditions/ADE_3.0_Installer.exe

Also renamed "My Digital Editions" folder in Documents to "Digital Editions Old"

That worked, but don't know which action was responsible. Should have done them separately...

[Elizabeth Schatz]

This link to install 3.0 doesn't work. I click on it and nothing happens.

[PandorasboxUK]

This worked for me!! Thank you.  I had issues with 4.5 eddition so I unistalled it and installed the 3.0.  I got the authorisation activiation error and so I took the above steps removed the adept file, reauthorised and BINGO!!