Notice that I've opened the plugin "edit" function to show you how we're setting it up. One of the things I like about this plugin is that it allows us to select the pages we want to show. Later, we may want to only have navigation from one page to another with a link on the page. We want to keep the number of pages in this box manageable, so as not to discourage our visitor from finding what they need.
Set up the way you see it here and click the "Change" button to save your setup. Then click the "Save Changes" button, and both plugins are shown and should display on the site.