I am using he latest version of M1 Tune software, with the GPR package. Make some changes to the Data Properties through the Tool/ Show Data Properties.
1. The 1st item changed was Celsius to Fahrenheit. The labels on the coolant temp gauge did change, but the gauge face did not and reflect the new scaling.
2. The 2nd item changed was km to miles. Did not see a gauge for anything with mi/hr. I don't expect and issue hear.