Need some help switching from RTD3.

[Fusion Training Systems]

I had a 21 Mustang GT tuned using the RTD3 on the TDN app.
I sold the car and now have a 25 GT and getting ready to purchase my tune and the newer RTD4.
Do I need to close my previous TDN app down since I don’t need those tunes anymore or can I just erase all those tunes and use it for the new RTD4?
I ask because when i go to the tools section it’s still setup for the RTD3.
Thanks

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[ZXMustang]

You will use the same TDN app and login. You should see your old car in the TDN app, and when you get the RTD4 for the s650, you can read it out and you will have another vehicle profile for the new car with tunes under that. You will need 4 more credits for the new car.