I have been using GPO with DP 4.12 and have not had any problems whatsoever--HOWEVAH, there is one thing that I would like to do that I can't do and that is create "freeze" tracks of different selected instruments in ONE INSTANCE of the Kontakt player.
It seems that if you load up 8 slots with instruments, you have to freeze ALL 8 instruments, otherwise if you do it incrementally or in small groups, the program will OVERWRITE the first frozen track.
It would be nice if selected parts (of the 8 instruments) in ONE instance of the Kontakt player could be broken out and made into a "frozen" tracks. In DP 4, it's difficult to deal with individual instruments in the Kontakt player although they play as advertised. If you apply Reverb to one instrument, it applies to the whole 8 in the Kontakt instance. I understand this is not true in PC land and other sequencers. But, for the Mac and DP 4, I see no other way.