I've found the problem, or at least, how to fix it. I had to update WinRAR (from 4.20 to 5.50). I've never had to do that for unpacking any RARs before so you must have done something that affected compatibility.
next time i'm going to package the game in .zip
I have the same prtoblem whit distribution , we solved packing a installer whit inosetup
oh god, sorry thanks for the feedback
