The making a COPY on the ST-16 is referring to a copy that has different calibrations. Some of the guys have been changing the curves on the inputs, and make a copy so that if they mess something up they can go back to the original. I DO NOT recommend playing with the curves unless you really know what you are doing.
To unbind the aircraft, turn OFF the ST-16, turn on the aircraft, once powered up, tilt the aircraft forward about 45 degrees 3 times, it will put it into binding mode. Turn off the aircraft. Turn back on the st-16, go into PAD mode, go into installed APKs and find the Yuneec flight controller, delete all the APK data.
Your ST-16 and you H will now be UNbound No not attempt to fly till you re-bind.
You will also have to reset all the defaults (language, advanced, and units) on the ST-16 if you delete the flight data.