When I try to download the EXE, Windows blocks it. How to override that? I tried the ZIP but don't know what goes into what folder. Copied into D:\Program Files (x86)\Steam\steamapps\common\XCom UFO Defense and that didn't work so I copied it down one more level: D:\Program Files (x86)\Steam\steamapps\common\XCom UFO Defense\XCOM. And that didn't work either.