Have purchased and downloaded the Fuji tethering app, but it does not show up in the Lightroom plug in manager!
I've got Lightroom 5.7.1 and have downloaded the Creative Cloud desktop app.
Am running Windows 10 and have checked I've selected the windows version of the app.
The app shows up in the 'my add ons'
Start with these generic troubleshooting steps: Adobe Exchange. In particular, make sure you've enabled sync-files and that it isn't paused, and that you've then restarted LR. If those steps don't help, you'll probably need to contact Fuji, since it's their plugin.