- Here you go call Factory Trane Controls Software Registration at 800-860-7909 this is the number I used for the exact same reason. They must deal with this kind of stuff everyday. They stepped through the whole re- registering process from one computer to next and were very friendly about it.
M 100 Tech is right this changed a few years ago the end user can not contact Tech support direct any more too many people trying to register more than one computer per licensed copy. If you contact your local sales office most will send off an e-mail at your request to reset the locking code without a visit from a technician this can only be done once or twice a year. if a site visit is necessary(I'd recommend having a site visit because if you break it you are responsible if they break it it is theirs and you will get the latest SP) the whole process should not take more than a couple hours.