The new NAMI EasySite theme which uses a Visual Page Builder also uses a special menu called the 'Mega Menu', which allows for features such as adding icons to menu links, embedding widgets such as upcoming events into a drop down panel, and using images in place of text. Most likely, four of the menus in your site have these 'Mega' features, generally your Main Menu, the Top Menu, the Top Menu Secondary and the Footer Social Icons menu.

If your site has a mega menu, you can add icons to the side of the drop down mega menu.

In the WordPress dashboard, navigate to Appearance, then Menus. Then, select the menu you wish to edit. The website's primary top menu is the Main Menu (Max Mega Menu Location 1), but you may need to select a different menu. 

Click the blue Save Menu button when finished.