Closed Digital Edition.
Rename My Digital Edition Folder under your Dokuments in My Digital Edition.old.
Start the Software again with right click and run as admin and check if now it works.
Tried it. Did not work. Still stuck at loading library.
In my case it worked. Thanks!
I have had this problem. It seems to only occur whenever I have first connected my Kobo reader to the computer. Try starting Digital Editions with no ereader or other device connected, then connect your ereader.