Once I simulate a game and then click on game summary, the window does not have a button to push to exit out. I have tried hitting ALT+F4, ESC, and left clicking to get a pop up. Nothing works!! I have had to close the game in order to get out of it. Anyone else have this issue? Wanted to ask here before submitting ticket. Thanks.

Make sure if you're on a high res monitor that you set scaling to 100. Could be it's zoomed in just enough that the X isn't appearing.

Thank you so much. That is exactly what was wrong. I was zoomed in to 150%.