got it thank you !

You don't need a key for the Max Decoder.
Under the menu: "Info" you will find the key
You can update with this.
Please copy it down beforehand because it will be deleted after the update.
After that, in the .INI file, enable the missing functions.
SSTV and other things don't work because the decoder doesn't have the
did not install the necessary hardware.
Greetings from DE

I need to purchase a ATS25 max decoder II H-RADIO firmware activation key purchase for US