*sorry for my english*
I was having this problem a few days before. None of the solutions have worked for me. Although I figured out a solution which worked partly for me.
1. Uninstall OBS, but don't check the option, where you can delete user settings.
2. Go into %appdata% and change name of the "obs-studio" folder to e.g. "obs-studio1".
3. Then install OBS again.
Now you should have your OBS running smooth, but it will be returned to default settings (as you would uninstall it with the option to delete user settings). It is because OBS had to create new "obs-studio" folder in %appdata%.
Now you have folder "obs-studio" and "obs-studio1". In my case I was checking what caused the crash by copying single files from "obs-studio1" to "obs-studio". It came out that my active scenes (scenes.json) was causing the crash.
That's why this solution was not so great for me, because I had to make all the scenes again. Fortunately I had some backups.
I hope it will help somebody.