• The contents of the Libraries tab can now be filtered by text search.
• The contents of the Libraries tab can now be alphabetically sorted.

• The virtual keyboard now automatically resizes to match rack widths higher than the default.
• KSP: The maximum number of controls per control type has now been raised to 512.
• KSP: The maximum array size has now been raised to 1000000.
• KSP: get_control_par () wouldn't work for ui_level_meter.
• KSP: One can now have up to three file selector widgets in a single script slot.
• The Manage Libraries button now launches the Libraries preferences.

• Default file sorting was seemingly random on APFS volumes.
• Some KSP UI elements would disappear when used in multiple instruments in the same rack.
• KSP: Kontakt would crash when attempting to build a MIDI pattern from a large while loop.
• Certain filters would use more memory than necessary.
• KSP: mf_reset () would not return an async ID.

BassDaddy
I doesn't seem like they would be very far along on Kontakt 6 if they are still releasing K5 updates.

Mesh
One more update to 5.9.0, and then K6?