Add Blogroll Page featured image on Cyberchimp Fine Pro blogroll page?

I’m using Cyberchimps’ Fine Pro template, which works quite well, but I’m stuck on how to add a featured image to the blogroll page (see https://michaelsemer.com/?page_id=585) to act as a custom-designed title for the blog, which is embedded inside my personal site?

The template won’t allow me to simply add an image or Featured Image of its own to the blogroll/past posts page. Mucking about with widgets and Boxes hasn’t worked: the template ignores them.

I could add it to the header, I suppose, but the same issue arises. Custom header plug-ins don’t work on this page, and I’ve been through several.

I’d ask Cyberchimps’ devs for the solution, but they want me to upgrade to paid support before they give me any assistance. Fair enough, I suppose, but I thought I’d as the community here first..?