Hello,
Thanks for using our theme.
Please check – https://xstore.helpscoutdocs.com/article/27-mega-menu
Do you use Elementor or WPBakery? Enable your editor for static blocks, then just create the desired menu content via block and select this block for the menu item.
Do not worry about old “menu location” settings, just go to Theme Options > Header builder > Menu element > select menu.
Update to 7.2.4.1version is not obligatory and can be skipped.
Let us know if you need any further assistance
Regards