I'm trying to export a game as an exe file, but it won't export properly. When I click the exported exe file it opens, but the screen is black and after a while it says the program doesn't answer and has to be shut down. When I used the demo version this didn't happen, but it now does with my pro version. The games were made when I had the demo version, but I don't know if that's what's causing it, because I tried making a quick test as well but that didn't export properly either. In short, everything it exports turns up with a black screen and gets shut down.
Any ideas what could be wrong?