Longform plugin - no option to "Create Longform Project"

What I’m trying to do

I’m trying to use the Longform plugin to work on a novel. I am following their readme but I cannot complete the first step because when I right click on a folder in my vault, there is no option for “Create Longform Project”. I only have an option to mark as a Longform project, which takes me to a different menu not discussed in the readme. Not sure what I am missing?

Things I have tried

Lots of various search terms for “Create Longform Project” and related phrases. I’ve restarted Obsidian, made sure the Lonform plugin is actually activated, and still no dice. Thank you!