Hmm, the only info I could have given you on that is that all of those unzipped files (Evolution.exe, Evolution_Data and UnityPlayer.dll) need to be in the same folder, but you said that they already are. There's also nothing else I can find that might be causing this issue. The last time I tested the Windows build everything worked fine. I downloaded the .zip, unzipped it and then ran the .exe
Maybe someone else who uses Windows as their main OS and has had this problem before can help you out.