I did that. But most of the time it doesn't help.
And also something strange, in regards to my keyboard detect problem. I'm noticing it's a problem with the export... and still. I exported it again and again and again... untill I had a working game that didn't have that camera-jitter problem with the keyboards. So when I finally thought that was it... nope. A few hours later I wanted to test my executable again, the one that was working fine. And again those keyboard/camera-jitter problems occur.
I think it's also the same reason why in the beginning, it used the icons that I had chosen for the game. And after the export it were the icons I selected. But all of a sudden that exe file has the Godot-icon again.
Edit - so I'm getting closer to the weirdness. Exported it again, everything works fine. I close the executable, then I close Godot, then I launch the executable again... and again the problems occurs. So is there something that isn't being exported that make these problems occur when Godot itself isn't running?