My Kobo did an automatic update and then any content I transferred from adobe digital editions to the kobo gave me an error saying I did not have the proper permission to read it when I tried to open it on the Kobo. I went back to try and figure out the problem tonight and when I tried to transfer content from the Public Library download library to the digital editions I got a message that said "Error. Check Activation"
I uninstalled V4.5 then installed V3 but no luck. Reinstalled V4.5 and still cannot transfer to Kobo. I wonder if its easier with Kindle.
I just spent about an hour on the phone with Kobo support since I didn't get anywhere with the adobe support, they just sent me here and told me to post. The Kobo guy had me do a factory reset on my Kobo touch, uninstall all other editions of adobe digital editions (I had version 2 and 4.5 - which was the one I was using when the problem happened) install adobe digital editions 3.0, reauthorize my Kobo account, Digital editions 3.0 and the device within digital editions, then borrow a book from the library. The first book I borrowed went into digital editions without the "Error. Check Activation" message but when I transferred it to the Kobo I got the unauthorized to read this message. He had me try downloading another book. I did and when I transferred it to the Kobo it worked, then I check the previous book that had just said I was unauthorized and it was fine now. Hopefully that is the end of the problems. He also said to NEVER update the Kobo unless you are having problems, so if prompted to update in the future I will not