Garry's mod 13 Beta crashes

Everytime I open GMOD 13 beta, it takes about 3 seconds and then it crashes and says “hl2.exe had stopped working”. What can I do?

You can delete your addons and try them out one-at-a-time, maybe one is causing your problem.

I have no addons, I can’t even creat a new game. It crashes before it finishes to load.

Try redownloading the whole beta, then.