I have tired uninstalling, re-installing and updating with no improvement.
Before you did the upgrade what versions of vBulletin and vBGallery did you have on the server?
If you uninstalled the gallery the data is gone. There is a few things you can do.
1) Restore the database from a backup before the upgrade. If your photos are still there excellent
, if not upload your photos from backup.
2) Install a new gallery and mass upload your photos via FTP option back into the gallery.