Cumulus Support

After running v3 fora few years, I upgraded to v4, but hit problems after an update. I then went back to v3283a. Now when I run CumulusMX, it says it is v4.022. How can that be because I have installed v3 to it's own v3 folder, where as v4 was in just CumuslMX folder.
yesterday CumulusMXv3 said we had 35.6 mm of rain, but there was none, 0.0mm. I tried to edit it but it stayed at 35.6mm.

Any suggestions please.

Update:
I disabled Cumulus v4 from running as a service, rebooted my linux machine then started cumulusv3 again. Now the rainfall is correct for yesterday, as well as for today.
It is also showing the correct version number of 3283.