I changed the resolution in the menu and the screen went blank, my monitor saying "out of range". I waited for it to change back....nothing. I tried adding "-safe" to the launch command in "properties" but no joy. Tried uninstalling/reinstalling. Still same problem.
Anyone have any ideas? I've tried asking steam support but no reply as yet.
Really frustrating as I've just worked out the solution to a puzzle I was stuck on lol!