I have used my NOOK GLowlight and it worked downloading bks from public lib.
Tried this weekend, would not let me. Have spent hours with Barnes and Noble people, etc. Uninstalled ADE, reloaded 3.0, took off, tried ADE2.0, still getting not authorized. ( the computer.) I have an AD ID, cannot make a second acct. as recommended in another answer, as they have my email will not let me create a second acct.
When I plug in NOOK to Computer( MAC) it says you may now safely move files from your PC to your NOOK.
It worked before, BUT I did download the new OS System inbetween when it worked and now.
Frustrated, as this was a gift from my daughter and now I cannot use.
any other suggestions greatly appreciated before Adobe opens tomorrow.