Ok, here's what I'd do if I were you.
0. I'd make a backup of an existing database.
1. I'd save images externally (uncheck this option in Preferences)
2. I'd export database both to xml and csv, while having Firebird files embedded and with older version of PVD.
3. I'd uninstall PVD, and clean registry, and restart computer.
4. I'd install new version of PVD with unchecked option "Save images to database"
5. I'd import csv, or xml.
6. I'd follow this
procedure to import images.
Cheers