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So i biught it s=from steam and used the link for the 18 plus how do i know its working? i unzipped the file but the game looks pretty much the same

There should be 1 more CG in each character's gallery (3 nsfw cgs total), which you'll be able to unlock if you play through to the correct area. Make sure you installed the patch by replacing files properly, otherwise it won't be applied!

How do I replace the files? Or where would I replace them?

I also have the windows version 

Never mind I’m just stupid I got it sorted