Authorization Type?

If I upgrade an existing Trixbox system to the new FreePBX 2.5rc1 and that system is not using the Database as its authtype then back it up and restore on a clean FreePBX 2.5rc1 machine that does have the Database as its authtype will it get changed to the backedup system authtype?

Also, does the backup - backup the /tftp dir as well? Or better question what dirs does the backup backup.