FYI: The game warns you about this if you switch to full screen, but it happens even if you don't: the game runs faster than it's supposed to if you have a high hz or a g-sync monitor.
You need to use RTSS to limit the framerate. The exe of the game is located at:
%USERPROFILE%\AppData\Local\Temp\IXP000.TMP
but only when the game is running. The IXP folder doesn't exist if you don't launch the game.