Features
• 4 built-in themes with customizable colors
• stacked (vertical) mode in for smaller screens
• supports full width in layout grids.
• integrates with @font-face and Google fonts functionality of WWB.
• and lots of other options!
More information
https://www.wysiwygwebbuilder.com/smartmenus.html
You can download the new extension via the Extension Manager: Menu->Tools->Extension Manager->Online Gallery->Navigation
Please read the included (PDF) document for help.