Really weird. Just to make sure I didn't do anything too stupid, you did get the .exe, not the .x86_64, right? Because I've accidentally mixed them up in the past, and I develop on a Linux box so I might not see that
Also, is it in the same folder as the .pck file? Because it does need that to run. All of the files should be in the same directory together or it won't be able to start.