Sprint Booster and like products

HEK

Since I bought the Sprint unit I have been having more fun driving the car. I have not tried the Race mode but in sports, there is such a difference in the settings on how you drive and my way of driving has not changed. I almost spun the tires on setting "Sports 9". I drive in my town and do not want to draw attention or should I say more attention since I already get stares from just having a "clean" Z. If tomorrow I decide to sell the car, I can just unplug it. Can I undo the tuning once is done "for free" or do I need to open my wallet again. Thanks , this is a legit question.