WIndows 10, states DE is authorised for this computer - but when I try to download a book from Kobo - ERROR! Check Activation

[kimbapin]

I am running Windows 10 - formally windows 7 with no issues.  Digital Editions states computer is athorised - but when I try to download a book from Kobo I get the following error (Error! Check Authorisation)  I have tried to unauthorse but it tells me I have to be online???

[Nanaky]

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.