Is this the sequence you tried? This is from our forum and worked for me.
Key in off position
Kill switch in [X] (off) posiition
Put bike in Neutral
Sit on bike, kickstand up.
Make sure the CC is off (pre 2017)
Turn on Key
Turn on Ignition (Red lever kill switch on / down)
Green light for CC should be blinking
Start the reset sequence:
Activate the Front Brake Switch by pulling and releasing the front brake
Activate the Rear Brake Switch by pressing and releasing the rear brake pedal
Activate the Clutch Switch by pulling and releasing the Clutch
Activate the Twist Grip Cruise Control cancel switch by operating and holding the throttle grip in the fully closed position
Press the Cruise Control On/Off switch to ON (on the ’15, +/Accel switch on '17)