Me, too. I have spent quite some time trying to figure this out because it was my first time using the plugin after the theme developer recommended it. Now I see that the plugin is only compatible to WP 3.9.2.
I have a static page set so am just trying to show a footer widget on home page using is_front_page(). As long as the widget logic field is blank, the widget displays on all pages. After adding is_front_page() or any shortcode, the widget disappears from all pages/posts. Using Widget Logic v.57 and WP 4.0. When will the plugin be made compatible with WP 4.0?