To be fair I'm running this on my Mac with Wine. Will try this on my pc because maybe the Wine wrapper is not reading the system file correctly.Actually all you have to do is change one value in system txt file in the save folder from a 0 into a 1. I've tested this myself by changing it to 0 and the gallery locked up and by setting it to 1 it unlokced.
To be specific you have to change the following value:
[Clear]
Clear=0
into
[Clear]
Clear=1