Audyaplayer,
i am so sorry cos you cant update your instrumen.That is wery frustrated I know.Here is one wery inportant thing.Maby you dont know that.Ewery pendrive from Ketron with update data is unique.That mean you can update only one Audya who you haw.In ather Audya instrument that pendrive is unusable.So ewery Audya haw a special kay who you cant used in ather instrument.
Maby is that the problem what you haw.
And yes:Tyros4 is my option too....