I bought some ebooks from Kobo; having had to register there. I then downloaded ADE onto my notebook plus acsm files from Kobo.
Having installed ADE I added the acsm files to the library which resulted in the books being downloaded.
During authorization, I could find nothing fro Kobo, so used my existing Adobe ID which was not recognised.
I then continued without authorization.
After resetting my Adobe ID, I can no longer open the books in this notebook; Acer with win 8, or any other.
How can I correct this problem?