I was able to restore from NTBackup after a couple tries. For anyone else using a similar cofig to mine, I will post the procedure that worked.
I shut down MySql.
I created a new empty folder, and restored the G2Data directory as well as the MySql/Data/Database directory to it.
I renamed the old G2Data directory to G2DataBACKUP, and the obsolete Database Directory to DatabaseBACKUP.
Then copied the restored data to their original directory, verified the gallery had been restored, and deleted the BACKUP files.
Note: for some reason restoring to their original location instead of the New Folder was not working. Don't know why...
Hope this info is usefull to someone.