I tried to do a restore from the command prompt by logging onto the terminal as root and running the following commands:
backup.plx -l
I got a list of available backups.
I then ran:
backup.plx -i cfg_12345_1231231231 (using the actual cfg names, of course)
I ran this on every backup which it listed, starting with the newest. None worked and all I got was the help screen for backup.plx. I also tried it with the -d and -e just for kicks. I ended up doing a factory reset and restoring from a backup .adf file which had been emailed to me.