My second day playing the game, it crashed at the end of each match with the "Made with UDK stopped working" message. I did some troubleshooting and have never had the issue again. I'm not sure what fixed it, though. I think it was updating my display adapter driver software.
Anyway, it seems the issue may be the user's computer's reaction to the end-game sequence. It'd be nice if the devs are able to repair it, but in the meantime, the user may be able to fix it with 30 minutes of tweaking.