Hey man tnx for commenting! I had a few people tell me that but I just dont know how to fix it. For some people it just does not want to open. Im sorry!
Hell yeah! And also just noticed that it is open source but here you go anyways: https://github.com/TheGameCreators/FPS-Creator-Classic
On that page there's 2 links. 1 says FPS Creator Classic and the other says FPS Creator Classic Update V120. Which did you use?