POE2 game freezes after GGG screen (launched from Steam)

I was trying to fix some lag, game issues and thought it was the Direct X 12 so changed to Direct X 11 and now I can't even get into game as it freezes. I can't go to the main menu to change it back. Its virtually unplayable right now and I don't know what to do to sort it out :( I have to restart my computer to close the game.