Hi, I just got my Trophy last week and there is a physical button on the dash, can be seen in the photo, to disable stop start. It is also disabled automatically in one of the modes as mentioned above.
As a gripe I cant figure out (and it may not be possible) how to disable the engine noise coming through the speakers while having the powertrain, throttle and exhaust in race mode.
Some photos to help you make up your mind if you havent already.