Up to last week I was working only on a Mac, and GPO and Kontakt full coexist quite nicely.
I just got a brand new PC to expand my "orchestra", and on the PC they screw each other up. Installing GPO (including the recent update) makes the Kontakt player crash as soon as I try to play anything. Reinstalling the Kontakt player (1.5.3) fixes the problem, but makes GPO crash as soon as I try to play anything! Catch 22!
I know I could just work with Kontakt full, but is there a way to avoid/fix this problem?