Thanks for getting back to me.
The best thing to do is to update them all at the same time
Would have been nice to be made aware of prior to having to allocate over an hour to carry out a simple update. This problem could have been sorted out with a script, rather than one that deactivates the 3.12 plugins without any warning.
I seem to remember that the last update left community events unusable for over a week whilst a fix was built.
Anyhow, the plugins work now and waiting with trepidation for your next update!!