TTS consists of three parts....software, maps, and a dongle. The software and maps reside on your computer and the dongle on the interface cable. The dongle locks into the vin of the first bike your program. So, the answer to your question as I understand it is NO, you must buy another copy of TTS if you change bikes so you get another new dongle.
When I bought my TTS, I bought the two bike version (one dongle but allows two bikes to be programmed). I used the first slot on my FXDWG and 1.5 years later, used the second slot on my new CVO ultra black. Now I am also out of slots. If I sell the FXDWG at some point, I cannot let the dongle go with it because I need it for my CVO.
If you buy a bike that has been tuned with TTS, ask about getting the dongle that goes with it. If it is a one bike dongle, it does the prior owner no good to keep it.
Hope this helps,
Richard