Responsive?

Hello, I am here researching my Catch Everest them, because Google lists it as not mobile-friendly. Do I need to upgrade to the Pro version to have it listed as mobile-friendly by Google? This is one of my slower sites, but I still want it to look excellent. I paid $24.99 to Catch Themes for "something" a couple of years ago, but maybe that was unrelated to this theme. http://www.ronmillersworldpublishing.com Appreciate any advice.