Thanks @IvaRo - I think the menu is loading correctly
If it is missing the user just needs to "save" settings and it will appear.
But we'll fix this in a future version. It's only on the initial upload of Pulse5 so not a problem once the site is live
As for the megamenu, this is a good idea. Pulse5's built-in navigation can already handle sub-menu items. But the styling of the menu is up to the designer when they make their template in layout.php and the CSS