Remove CatchThemes link from footer?

How do I remove the "CATCH FULLSCREEN PRO BY CATCH THEMES" text and link from the footer? In the customizer footer content I only see "Copyright © [the-year] [site-link]. All Rights Reserved. [privacy-policy-link] " so you don't make it easy to manage this. I also notice it doesn't appear in the wordpress customizer view, but it is there on my actual site. So presumably you've got a sneaky bit of code somewhere to get a bunch of backlinks.