Reset single control

So on BeamNG on my laptop I tried changing the control to switch nodegrabber strength from the scroll wheel to backspace (due to the fact that I didn’t have a mouse at the time). Sadly, this doesn’t work. However, now that I have a mouse I want to put it back to the scroll wheel. However, I can’t. When I try to it doesn’t set the control when I scroll with the mouse. I don’t want to reset all my controls as I spent about half an hour customising them to exactly what I want and don’t want to have to change them all back, it is ONLY this control I want to change. At the moment I cannot change the nodegrabber strength no matter what I set the control to unless it’s a variable input, but i use all of them for other functions

 

Hmm it might be that it was just lagging but when I tried that before it wasn't doing anything, I'll try again now to see.
--- Post updated ---
Alright I tried it the button seems to do nothing, either it's grayed out with a sign for a cursor when I hover over it or it's not grayed out but pressing it does absolutely nothing. I can remove the binding that's been set but it leaves it with no binding. Not sure whether I'm doing something wrong or if there's something not working properly

 

Wow did I actually discover a bug? I thought maybe there was a mod that made it not work, well anyways I don't really need that button right now, I'll wait for it to be fixed. Thanks for the help