Thanks, It’s working now, except it’s not responsive and that’s the reason we bought it. When I go to the themes page in the admin panel and check theme details of the child theme, it says “This is a child theme of Contango Pro.” so it seems to be setup properly.
I didn’t delete the free version, but it’s in the folder “contango-old” and the theme name is “Contango” while the pro name is “Contango Pro”.