I have had a Sony E-reader for years and they have now beentaken over by Kobo. Recently due to change of location, I had to change my email address. Now my old "books" on the reader come up with the message "Protected by Digital Rights Management" - I asume because I have a " new" "Adobe ID" because of my change of email address - and because the old email address no longer exists I can't get back to the old Adobe ID . Any advice????