What would it require just /ledoff and then if they don't have that registery key it will add it?
Since I can't give REP yet i gave you an internet
EDIT: I found someone to test, but he din't have Plus! so he manually added it, he used Logitech Fusion which doesn't support that feature and it worked! but he need to restart, is there a way of letting the user need to know they'll restart for it to work? or is there a way so they don't need to reboot.