Two menus show up on mobile site

I am building a site on the Accelerate theme. I installed the Max Mega Menu, and it looks great so far on a computer screen. However, when I switch to a mobile platform where the menu is collapsed, I have two menus showing. One is the Max Mega Menu, which is showing up exactly how it should. But the standard theme menu is also showing up right above it. Does anyone know how to stop the theme menu from appearing on a mobile platform?

The site is still being built but can be viewed by putting the server IP in your browser: 204.186.97.32

Thanks!