I was thinking (out of experience) how unlogical it is to save fm calibration settings with the rest of the settings. Since when fm calibration settings are right, all presets can be loaded independently from that. If I want to load a new preset I want to try out on my fm transmitter, I have to copy and paste the fm calibration data from my old preset to the new one. Also, calibration settings differ from computer to computer depending on the sound card, same problem when trying out same presets among different computers.
So my suggestion is to either add a separate save/load feature for fm calibration settings, or make the user able to choose what settings to export / import. To add that bit of user friendlyness
