Mega Menu does not work correctly

Any idea why this mega menu plugin would not work correctly?

I created a widget area as per the instructions just below the header:

<?php bfa_widget_area('name=My new widget area&align=2'); ?>

and then dragged the mega menu plugin widget into it:

https://www.ads-software.com/extend/plugins/jquery-mega-menu/

Unfortunately although the menu shows up, it looks just like the regular vertical menu.

Any ideas?