Hi Dave,
I start to think it’s also possible something went wrong during your update / upgrade process.
It will help a lot to have a look at your can-traffic logfile. It should be available at /home/pi/rnslogs.
Also to be sure your Video Interface is or isn’t responding to any can-messages I send, I uploaded a version which does not send any messages (so only RNS buttons should work).
Kind regards,
Jeroen