December 19, 201312 yr I just can't unregister my PMDG777 after doing it several times in FMC/CDU ,and it indicated this picture Jim Shieh
December 19, 201312 yr I just can't unregister my PMDG777 after doing it several times in FMC/CDU ,and it indicated this picture send a ticket to PMDG so that they'll reset your activation number. Richard Avenido
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