@redemptioner, the correct file to use is https://github.com/Duet3D/MagneticFilamentMonitor/blob/master/Release-44a/FilamentSensor.elf. I've checked that it matches the latest one that I built. It should report firmware version 3.
[Duet3D rotating magnet filament monitor v1 on pin e0stop, enabled, sensitivity 25.98mm/rev, allow 85% to 125%, check every 3.0mm, no data received]
As RRF has received no data from the filament monitor, the reported version won't be correct. You need to sort out the comms error. Does the LED on the filament monitor flash red and green?