Do you need to restart the game for this update> Because, the unlocked gallery is now locked.
Viewing post in Trouble iN The aRena comments
Huh, odd. You also moved the persistent save file? Because that's the one that should keep track of the gallery.
Also just to make sure, they've been moved into the save folder that exist in /C:\Users\???\AppData\Roaming\RenPy\TroubleiNTheaRena- ?
If they're just moved into the save folder within the game folder, it might not register correctly.