Issue with L4d2 Auth Tools Hammer

[soraka]

Hey everyone. I got this issue with the L4D2 Authoring tools, with Hammer Editor to be exact.
When i first used it for a few days, i had no problems regarding this.
But suddenly one day when i booted Hammer, it would instantly go to a white screen and Windows gives me a message that Hammer Editor stopped responding.
I know people say it takes a while to load, but for me it crashes even if i leave it alone. It goes to the error as soon as Hammer started up.
I tried leaving it alone for 30 minutes, but no help either. I also tried reinstalling the Auth Tools and tried reinstalling L4D2, but that did not help me either.
I tried looking online, i posted on the steam forums. No help either.

Would anyone have an idea what i still could do, or would anyone know to fix this?
Thank you in advance.