Restore from 8.3.0 to 8.1.1? How do I restore from Plesk 8.3 to Plesk 8.1? I have a client with a large amount of e-mail. I don't want to have them lose e-mail. What happened was I moved them from a host with 8.1.1 to a host with 8.3. The host with 8.3 is unsatisfactory. I want them back on the host with 8.1.1. How can I do this? On a different client, I tried this, and the backup manager said the backup file I uploaded wasn't a valid backup file.