Was just trying to research this issue too. Moving the program from an old computer to a new one. From XP to Win 8 64. So far the "Restore Returns" seems to be working okay.
I copied the Backup folder from "c:documents and settingsall usersapplication datacch small firm servicesatx2012backup" to "c:programdatacch small firm servicesatx2012backup". Installed atx2012 on Win 8 64. Downloaded the latest update patch and installed. Ran the program and selected "Restore Returns" and checked all items. Because it says it backs up all the data automatically everytime a return is closed. So hopefully that location has the latest copies.
EDIT: The Restore process is very very slow. I think it'll take about 2 hours to restore the information. Also I ran into a lot of popup questions about overwriting people, payers, and companies. There was no previous existing data. What gives. What a lame program. Takes way way too long just to restore 1600 items.
EDIT2: After the restore was done, the program was stuck in an enless CPU usage cycle of 20%-30%, and was non responsive. I tried to give it 10 minutes, but then I had to kill the process.