Was it advertised as "unmarried"? It will save you money if it is. I believe you have to send it to the tuner of your choice to get it unmarried.
While they have it, they'll marry it to your car using your pcm(computer) number. They'll write you a tune or tunes, down load them in your X4 and Mail it back to you.
I think most tuners charge about $150 to unmarry a tuner, around $75 for one tune or three for$150.
Contact any one of the vendors here,Monday,that offer this service and they'll be more than happy to take your money....I mean help you out. Haha. Sorry, couldn't resist.