Apparently something has damaged your profile database.
VoiceAttack keeps backups of the database in that same folder("C:\Users\Rick\AppData\Roaming\VoiceAttack\Backup\"), you'll have to replace the broken .dat file with one of those(start with the most recent backup, and move on to the next if that doesn't work).
You may want to hold on to the broken database file(s), in case Gary wants to have a look at it(He won't be able to repair it, but it may provided clues as to what happened so it can be prevented in the future).