Spun: How to exclude a page from Custom Circles nav

Hi there-
I modified my Spun theme main page to show pages in the circles, instead of posts to use as a portfolio site. But now, I am trying to add an About page, which I do want on the main navigation top menu, but not in the circles, since it is not a portfolio project.

I saw there was another thread on this but the poster was using a child theme and ended up solving her problem using an avenue I did not understand, so I am posting now. There was a comment about adding an exclude and page ID , and I can find the page ID but I don’t know how or where I would need to exclude it in the CSS. I also saw exclude-plugins, but they looked like they would exclude it from everywhere, instead of from this very specific place.

I am not well-versed in css or html, though I feel like I managed to figure out a lot today. Just reached a place where the other people who’d had similar issue didn’t post their solutions as clearly.

Thank you!