Troubleshooting

What you see	What to do
No Kerf Modulators in the Extensions menu	Quit and restart REAPER: extensions load only at startup. Check there is exactly one reaper_kerf_modulators.so in ~/.config/REAPER/UserPlugins.
The panel is empty	The selected track has no plugins. Select a track that has some.
Modulation stops when I stop	That is the default. Turn off pause when stopped, in Settings.
A parameter will not move	Its own Parameter Modulation window is open in REAPER. Close it.
A cross-track follower is silent	Check the send Kerf Modulators made from the source track is still there.
Changes do not show after updating	An older copy is still in UserPlugins. Run the installer again; it removes old copies.

For help, bug reports and refunds within 30 days, visit kerfaudio.com. See Support.