ATS25 max Decoder with registrtion key for 4.17, can I downgrade to 4.16 Air with the same registration code?

[pa1mer]

I have bought a ATS25 Max-Decoder in China including the registration code on my ATS25 max decoder. The box contains version 4.17 beta and when using the digi mode, the system regulair reboots. only when using the digi mode. zo I am wondering if I can downgrade the software without buying a new registration code, it is already included in the system.

also how to retrieve the registration code for future use.

thank for a fast answer

Mario The PA1MER

[Binns]

also how to retrieve the registration code for future use.

See your key in INFO