What exactly are you trying to accomplish? Have you previously tuned your bike using the TTS MasterTune, and you've lost your custom calibration file (which is a .mt7 or .mt8 file)? If you have tuned it and you've lost your custom calibration file and haven't saved it somewhere, then it's gone if you have the older black dongle.
But if you have the blue dongle, the last cal flashed into the ECM is saved in the dongle, so you can retrieve it to a PC running the TTS software, and you can edit it.
I suggest you go read the TTS Tuning Guide to familiarize yourself with the TTS MasterTune. The OEM stock tune to which you are referring (the .mte file that was saved) is NOT editable and never has been. It is saved solely to enable you to restore your bike to a totally stock calibration.
If you want to tune your bike using the TTS, you need to go choose one of the TTS calibrations that most closely matches your engine hardware configuration from the TTS library, flash it into your bike, do a CamTune run to get your IVO setting right, and then go do VTune runs to get the VE tables mapped to your bike's engine configuration. That's the way the TTS system works.
Ken