Uninstall
although all options, menu items and menu categories get deleted from the database along with the table that holds any orders you may have received, you will manually have to delete any additional pages (such as the order page for example) that have been created as the plugin has no way of knowing if you are using this page elsewhere or have changed the content/name of it.
the same goes for the 3 example icons that come with this plugin as you might have used them elsewhere.