There is no update method in the add-on. I read on some threads to use terminal in HA to update the addon. in 'ha addons' I find a slug titled 'a0d7b954_zwavejs2mqtt', but "ha addons update a0d7b954_zwavejs2mqtt" yeilds "Error: No update available for add-on a0d7b954_zwavejs2mqtt".
What are the steps to (I assume) download the latest Zwave JS UI version from "https://github.com/hassio-addons/addon-zwave-js-ui", save it to a location, then use "ha update ... " to update the add-on? or do I have the process wrong?