When I went from 8.1 to 9 beta, it ate my 8.1 encrypted disk. Be sure to copy whatever you have in older encrypted disks to your desktop before upgrading. Also be aware that it will encrypt your e-mails without your awareness if you send an e-mail to someone whose public key you have. Unfortunately my son had misplaced my public key, so he couldn't read the email. But overall, I like the ease of operation.