I download the quicksave tool from the resources page and I can't get it to work. It says that it is enabled and that the hotkey is F5 but in-game it does nothing. Anyone got an idea how to get it to work?

also, try launching quicksave before launching the game, it helped me

I tried both running it as administrator and launching prior to launching the game, it doesn't work. Any other ideas?

Something else externally could be blocking the f5 input, such as another program. For example I use f9+f10 with livesplit, but that can sometimes cause issues too