If it was ever used to install a tune on a vehicle (we call that married to the vehicle), all you have to do is go to the screen that has the option to install the original tune. That will un-marry the Trinity from that vehicle, reset the Trinity, and allow you to use it on another vehicle.
If you ever connected the Trinity to a computer, while you had the DS Downloader program opened, and it updated the Trinity to a new version: You can not get that back. Once a tool is updated to new software, you can't go backwards.
2009 Challenger SRT
Kenne Bell 2.8LC Supercharger