The Min and Max values represent the Min and Max g values during the measuring interval. Can you share a screen shot of the values you are reading.
No, the sensor only sends the data in the time domain. The FFT processing is performed in the UI.
From the other post, i think you have purchased the Wireless Vibration Temperature Sensor whereas the Utility you are trying to run is for the Enterprise Vibration Temperature Sensor only. Can you please share the part that you have purchased.
We are certainly looking into the error that you are getting when you run this utility though.