Ohhh, I see that now. I had no idea that one could do this. I had seen various forums and the such around on the internet that mentioned the use of the F1 key but the posts were dated back as early as 2017 and as old as 2013 if not before then. I figured that such a tool was outdated and no longer available in more modern versions of Essentials. Up until now, your resource here was the only way to edit the controls during gameplay that I knew of.
I only wanted it because friends of mine years ago suggested it as an option for my fangame and that's how I discovered this script to begin with. Well, I'm elated that there's a way to do that still, I just had no idea it was already available. Apologies for wasting your time, I truly didn't know. Thanks for informing me!