Sorry for the delay. If you have immediate questions, feel free to contact the toll free support number. In regards to the comm errors with the LED, that does not happen often at all. If you experience similar problems again, please contact us directly. There may be an issue with the unit.
For the configuration utility, setup.exe is a setup program. Unzip the file to a folder, and run setup.exe. This will load the application. The app is installed into program files and is placed into the control panel.
The latest firmware is EZRain 2.0, so a return of 20 is correct. The sensor data and button at this time is not functional. It is an anticipated new feature. Sorry for the confusion there.
If you have any other questions, feel free to either call or you can email me directly.