I had a the same exact issue with Claire Oboe. It was OK in Kontakt 5, bad in K6 (no K7 at the time). It was the only Claire instrument in the series with THIS problem in the GUI. Resaving in K5 or K6 did not solve the problem. Finally Support sent me a working copy of the .nki file that worked perfectly in K6 (and perhaps also K5).
Perhaps it has to do with some of the "resource" files located in a path with different name, this worked OK in K5, not in K6, but does not happen to everybody. Everything should be correct in my folders... but for some reason the GUI did not work, same as yours.
In support they somehow denied any problem... but they actually FIXED it. No longer a problem. Perhaps this could be the shortest path to fix it. If you want you can use my username as a reference when you contact them, it is the same here and in 8Dio.