There is a preference setting... It's on the Hubitat web interface under "Settings" -> "Locations and Modes" -> "Temp Scale". The App/Driver uses the temperature sensor value, which is displayed in whatever scale is set on the hub. The code transmitted to the broadlink is always in Celsius and the sendcode function does the conversion. The thermostat code was originally written to take the temperature value from a physical device that would report according to it's own externally configured setting, so conversion of the input was required. For this use of the code, the input conversion is not needed, and I didn't remove the translation code.
It has been fixed in v0.03.