[JeniSkunk (Jenifur)]

I'm not finding it in Stellarium, at all, and I'd only installed the latest desktop release of Stellarium a few days back.
It does show up in Sky Safari, though.

edit: found why Stellarium on Windows desktop does not have the comet
I needed to update the data in the Solar System Editor plugin.

Update walkthrough
I had to learn this just now.

Configuration Window -> Plug-ins tab - Solar System Editor
Load at Startup checkbox should be ticked
" Configure " button

Solar System Editor window -> Solar System tab
" Import orbital elements in MPC format... " button

Import data window
Lists tab
Select type
radio button -> Comets
Select the source
Bookmarks drop list -> MPC's list of observable comets
" Get orbital elements " button

Import data window
" Mark all " button
" Add objects " button

Close windows