I updated my Digital Editions software yesterday and now when I download a book from my library (OverDrive) I can open the book on my computer but what I try to transfer the book to my Nook I receive the error message "Loan Token Not Found".

I just purchased a Nook Glowlight 3, and I could NOT get it to communicate with Adobe Digital Editions (ADE). After many frustrating hours looking up and trying every troubleshooting tip I could find I FINALLY found this tip that worked; deauthorizing and reauthorizing my Mac laptop with Adobe Digital Editions (ADE). Maybe that will work in this case? Might be worth a try. Here's the exact forum response that finally worked for me:

"ADE often gets its authorization confused.

First return the library book ~ it is probably now authorized with the mixed-up id, and you might not be able to return it once your proper ID is registered.

Clear any old authorization using ctrl-shift-D to ADE (cmd-shift-D if on Mac).

Restart ADE.

Try again to authorize ADE with your Adobe ID.

Then you should be able to set the ID into the Nook as well; and borrow the book back again.

Good luck ~ what a rubbish implementation of DRM Adobe has produced...."