You going to post the crashlog or no?
Short term the only thing you can do for this is to clear your configuration. Right click Start, choose Run and type %appdata% and press return. Scroll down the list of folders until you find obs-studio and then rename it to obs-studio-old. Unfortunately you'll have to recreate all your scene data and settings.
I thought I had seen this problem before but I can't find the original thread and I don't remember that there was a solution anyway it may be something that needs fixing.