Hopefully, it will work with the next version that just came out today!
I just tried with the Musclesculpt .17v zip file... and the exact same thing happened again. Again this is weird since this is the ONLY game I've tried that this happens with. This is kind of maddening to me. I have no idea what you did that my zip file unloader just is NOT liking this. (I'm using WinZip)
Again, it is weird since it is only YOUR zip that has had problems with. Yours also has been the only one that uses an underscore instead of dashes & dots as part of the file name. I don't know enough about how these things work to really know what is going on.
Unlike any other 'normal' zip file my PC doesn't ask if you want to open this file before doing it, it just auto-opens Winzip without me asking and then closes it. It's rather surreal. But let's see if 7zip works any different...