Apparently something strange is going on with the scroll filter. Follow these instructions:
1.) Open Finder, press Shift-Command-G
2.) Paste in this and press OK: ~/Library/Application Support/obs-studio/basic/scenes
3.) Upload the json file containing your scenes here somehow (open with a text editor and then copy and paste, or upload to pastebin.com and link it)
4.) Either rename the file or possibly just delete it entirely
5.) Try re-opening obs. Your scene data will be blank but I'm guessing it should open up.
Let me know if that helps, and please get me that file if possible.
