Perhaps it helps:
I had the same problem, I just updated to domoticz beta ( pi@raspberrypi:~/domoticz $ ./updatebeta)
All my settings are onscreen again.

Have a nice weekend

Yes, for over 10 years a working system with p1 meter solar panels and switches on a pi. Often browsed the forum for tips and found them.
I thought now it is time to connect my watermeter.
And found out it was more difficult than I thought.
Because the normal route by a magmatic switch I did not ...

Nice job.

I am also working on reading my water meter.
The model I have here has no reflective pice on the wheels. Even no wheels at all.
A magnetic switch like you used did not work also.
A compas showed that there is a magnet moving deep inside the meter.
So I thought I use a i2c magnetic sensor ...