I’m pretty sure when you purchase it, it comes with a license on it. I’ve always bought them (tractor, diesel trucks) with 1 vin license. This AutoCal has never been hooked up so it still has the vin license. I contacted BBP and they said it could be used for other configurations as well. Just hook it up, log stock file, send to BBP, they write a specific tune like if you have a CAI or whatever, they email it back to you and you load it. This should be the only purchase you make.