I have purchased the GP Premium AddOns.
When the GP Premium is activated, the Menu (/wp-admin/nav-menus.php) works perfectly.
When I Deactivate the GP Premium, the Menu completely disappears from the site.
This is in relation to Secondary Menu.
The reason I need to Deactivate the GP Premium, is because it causes AppPresser to fail completely.
While I’m waiting for an answer from the AppPresser guys, what would you recommend I do to re-create the header and secondary nav if I have to turn GP Premium off in order for AppPresser to work ?