problem with navigation menu

Hi after installing your theme and the demo date for demo12 when i go to edit the navigation menus for the site i don't have the options to use Products, Mega menu, tags, product brands or product categories I only have the option to chose pages, posts, custom links and categories (from the posts section) I haha included screen shots to show the problem.
Can you please help me fix this problem, my hosting server is running WP 4.5.3