Ok, I know the problem is because the editor does not like having triple buffering enabled. I found out this by searching here http://utforums.epicgames.com/showthread.php?t=587227&highlight=unreal+editor+crash Now the problem is the editor uses the the UT3.exe to execute, along with "editor" at the end. Is it possible to add a command line when adding a profile for DXoverrider? This way I can have TP in game, but disabled for the editor. The actual path is "D:\Program Files (x86)\Unreal Tournament 3\Binaries\UT3.exe" editor Currently I can only add the exe, which of course disables it for the whole game. Thanks in advance.