Hello all,
It looks like he released an update for this plugin. Go ahead and head over to Code Canyon and grab the updated version. He also has a new docs website regarding this:
http://sevenspark.com/docs/
This specific article may help:
http://sevenspark.com/docs/ubermenu-caching
It looks like he has a new function that you can drop in (replacing the current call to the wp_menu)
<?php uberMenu_direct( 'primary' ); ?>
Keep in mind you have to use the updated plugin to use that function. I am still working through getting the styles ported over locally before moving it to a development environment.