Hi
Thank you so much for using our theme.
As for menu issue is concerned kindly read the following documentation about menu.
https://xstore.helpscoutdocs.com/category/15-menu-set-up
https://www.youtube.com/watch?v=OnxkixHtVLI
Video Tutorial About Mega Menu
https://xstore.helpscoutdocs.com/article/59-03-how-to-create-a-mega-menu