NKS compatible libraries once installed show up in the Komplete Kontrol Browser.
Occasionally, in rare cases these are not located correctly, one potential cause of this is if the samples have been moved after the initial install.
First, open Native Access and ensure there are no updates for Komplete Kontrol. Install the latest update if available. Once update, remove the "favorites.db3" file.
Removing the DB3 file
The "favorites.db3" file is located in the below locations. Upon reloading Komplete Kontrol the database will automatically update.
Mac HD > Users > Username > Library > Application Support > Native Instruments > Shared > 'favorites.db3'
Note: The User Library is a hidden folder on macOS. To access it, click Go in the Finder menu bar and press down the Alt key. The Library entry will now appear in the menu.