I’m having the same problem. I don’t mind the widget ‘as is’, I just want to remove the stock text. When I click the Footer Widget 3 item in Customizer, the only thing there is Add a Widget. The choices then are: Archive, Calendar, Categories, Custom Menu, Meta, Pages, Recent Comments, Recent Posts, RSS, Search, Tag Cloud, Text, and WP Google Maps. So I thought MAYBE you meant a Pllugin called Footer 3 needed to be installed THEN selected, but no such Plugin was found (footer3 OR footer 3). A little more help please?