OptimizePress
Max Mega Menu is not suitable for integration with OptimizePress.
“OptimizePress was designed as a platform to create individual conversion pages for your business which are not forced to have a global header or settings which make all pages on your site look the same. Often conversion pages (Such as landing pages or sales pages) may need to look individual, or may want to be tested without the same logo and navigation as other pages on your site”
If you do want to use Max Mega Menu with OptimizePress you will need to use the shortcode or widget method to output a menu.