There should be an option to auto-activate the XMode Profile when a game on Armoury Crate is being launched.
Minimizing or exiting the game should turn off the XMode, and resuming the game will activate again the XMode.
This will be helpful, as may people uses only the XMode Profile when gaming. So I think there should be like a toggle on the Armoury Settings to turn on/off this feature.
Auto XMode when a game is launch
You don't need XMode for games. This is how Xmode used to work. Now we have separated XMode and our Game tuning which you can find in Armoury Crate. So all you need to do, is to set the game tuning your want for each game in their scenario profile. No need to turn XMode On/Off from quick tiles. Optimization will be automatic.