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I have a problem to change the language from Japanese to English on my AVIC-MRZ07

my AVIC-MRZ07 firmware running PLT version 1.000000.

I"d tried as DZO instruction post , and then solved manually but there was no change language to English.

So,Pls, tell me that How can I do for my problem.

Ps; And can I update my PLT version 1.000000 ?

Can Anyone help me... pls;