Anyone with sufficient computer smarts and familiarity with AC could download the installer from the AC website onto another computer. Then they could setup a dummy practice, and use the Restore program with the ".enc" backup file to reconstruct your entire practice on that computer, including eRx, assuming that person had a login and password.
Oh, I assumed, perhaps incorrectly, that one would have to have an admin login and password in order to restore from backup. Will any Amazing Charts low level login work? I haven't tried this.
...Ken