Erwin - PE3ES - F4VTQ
@Jim Sheldon, in this case it would be advisable to read and note the original calibration settings before doing the actual install of a new firmware.
Also as far as I understood the findings of KD8CEC a new firmware does not change the stored calibration values.
The KD8CEC Memory Manager software could be used to read the original values before doing any changes.
PE3ES - F4VTQ - Erwin