Did you just stumble across that reading the .ini file?
The part of this that is quite helpful is that appears you can make a backup of your radio's
calibration data in case it is ever lost or corrupted. This could save your radio from being
a brick or needing a trip back to a dealer.
The steps to save the calibration data:
1. Change 'testmode=0' to 1 in the 'setup` section of the settings.ini file
2. connect the radio
3. Start MD-380
4. Hit Control-T which will read the data off the radio.
5. Click "Save Test Data" which will save a .test file with an 8 KB binary of the calibration data.
6. Put the .test file some place where you can find it if you need it.
Thanks Stan G4EGH, that is an a really interesting find.