UNINSTALLING & UPDATING: Karabiner Elements is ODD in that it root locks its two apps such that no administrator can unlock them and therefore cannot toss them into the Trash for removal. BE NOT AFRAID! If you go into the 'Misc' tab inside the app, you'll find you can 'Uninstall' from there, and it works. You'll also find under that tab the 'Update' option, which will also work, despite the app being root locked. Yes, this is unheard of in my long Mac experience! But the app itself provides access to both options.