Change the Mini Menu Heading Name

Hi, I am working locally so I can't give you a site url. I am using Catch Everest Pro. I would like to change the heading used for the mini menu. I want to change it from "Menu" to "Main Menu." I would like this to be the heading for the mini menu on all the sites pages. I don't want it to reflect the name of the current page. Thank you for your help.