How to activate a Community Theme?

Things I have tried

I’ve searched the Obsidian Help pages and this forum, but I’m still not able to figure this out. I know the answer must be simple, but I’m drawing blanks.

In my active vault I did: Settings > Appearance > Themes > Manage, and then I installed the California Coast community theme. Only two buttons appear below it: “Selected” and “Update.”

What I’m trying to do

Activate the California Coast theme.

My Question

But no matter what else I try, I’m still stuck with Obsidian’s Default Dark theme. Now that I’ve installed the CC theme, how can I activate it?

Selected means you are using that theme, so it is activated. You might need to quit and re open Obsidian for it to show. Clicking update will update the Theme.

Barry