I have 3 monitors currently, 2 60hz and 1 144hz.  Sometimes when I alt+tab out of a fullscreen game and alt+tab back it picks one of those 3 randomly.  A monitor select option in the settings would resolve this.  A work around is to change the game to be Windowed, drag it to the monitor you want it to be on and Alt+Enter.
						
					
					
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	I can't even get mine to move to a new monitor. Why is there no monitor select??