As the title says it Crashes and i dont know why or anything :S
Just short after posting i found how to solve this in an older post linkt to an even older post so i will put i here so that it will be easy to find
Is it crashing when you try to close the UIscene editor?
If so , find all instances of
bInitializeShadersOnDemand=False
in the config files, and change it to
bInitializeShadersOnDemand=True
UDK\Engine\Config\BaseEngine.ini
UDK\UDKGame\Config\UDKEngine.ini
Just short after posting i found how to solve this in an older post linkt to an even older post so i will put i here so that it will be easy to find

Is it crashing when you try to close the UIscene editor?
If so , find all instances of
bInitializeShadersOnDemand=False
in the config files, and change it to
bInitializeShadersOnDemand=True
UDK\Engine\Config\BaseEngine.ini
UDK\UDKGame\Config\UDKEngine.ini