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You can have it reset for 99 bucks if you mail it into diablosport.Depending on whether or not you have the old version or not, they should also update your unit with the 2.13 bios.
As mentioned, you will have to send it back to Diablosport to get it reset for $99.00
They will also put the new version on it (2.13) if it does not already have it. If it does, you could have put the "stock" tune back in the car if you had access to it still. That would have reset it to use on another car.