StopPVRManager / StartPVRManager

Hi,
Have loved the MythTv addon for Kodi and been using it for some time.

My OSMC install on a Pi 3 has recently auto upgraded from 16 to 17.1 and now the Start and Stop PVRManager functions don’t work. I was using:

I used to ssh to my Pi from my phone and start or stop the MythTv plugin to allow the backend to shut down as it’s only switched on when in use or when recording. I also have a crontab to stop the PVR at night as the Pi does other jobs so is left on. (I found that if I disabled the setting in the addon to allow the backend to shut down then it would shut down in the middle of playback)

Can you advise if there is another way to disable and enable the addon from the command line please or if the above command can be made to work somehow? It still works on my other pi and Ubuntu installs that are both still on Kodi 16.

Thanks,
Al