Need to change the header menu layout

Here is my website: https://rocky-mountain-solutions.com/

The menu right now is at the top right. When I click on the 3 horizontal lines, the menu comes out from the right.

I want the menu to look just like the menu at the bottom of the page, which has all the menu items horizontally on the page.

I have tried everything in Customize, and I can’t seem to make it work. I do not want the menu to pop out from the right. I want to delete that.

Can someone please help me with this?

The menu at the top is a third party addon

The menu at the bottom is a normal BB menu module.