Remove responsiveness (toggle menu) from desktop version?

Hey, I’m using the Bigfoot theme http://themes.thehappybit.com/themes/bigfoot/ and I’m stuck trying to figure out how to remove the responsiveness from my webpage’s desktop version. I’d like for the top menus to show by default and not having to toggle the menu. I think this is confusing on the desktop version. Where would I manage this? Any guidance is much appreciated!