I didn't check that one as it says it can cause issues with uplay games. That being said I'm super dumb as I just created 3 GP instances, not Uplay ones.+ close shortcut and yeah that's all you need.
That being said this is scaring me
Call me dumb, I can totally be dumb as a brick at times, but the less I touch steam binding the better. I just want the default game mapping, nothing more.
And I don't even know where to check this 'Use the Big Picture etc.' thing.