I think you're both right. COBB doesn't allow flashing on multiple cars, however I think since the AP knows it's flashed on your car, even if the software is missing, it will allow a reflash / "change tune" to be run. Otherwise Cobb would issue huge warnings about this.
BTW anyone have experience with CP-E's "xCat" Downpipe fix? Same as BMS? It costs $80. Wonder how it works.