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Just to be 100% sure, I did exactly that, then went in with a hex editor and corrupted all of the files. No change.

If there's any doubt in your mind, test it yourself: Make a backup of that folder and do whatever you want with those class files, corrupt them, make them blank etc.

Is there a change? Does the game still work? It does here.

Now do the same with the hashed files from my post and you'll get an instant crash, your game wont even start, because it's actually trying to read the corrupted files!!!

Which folder are you talking about? I have it in two places.