Same thing happen to me.
- It blew out my gallery
There was a bug in AdminCP backend files that did not pass the category ID when removing a category. This sent the delete command to all category ID's.
The tables below went empty.
The current version that is ready for download has been patched.
Restore your backup of the database before the upgrade.
- Download the current build from photopost.com
- upload and replace the current files on your webserver.
[ x ] Upgrade