Most third-party libraries you might create, purchase from smaller developers, or acquire through other channels, have been encoded by Native Instruments. Consequently, they won't appear in this tab and cannot be installed by the standard "Add Library" button. To use these, you generally must use the version of Kontakt the library was created in or newer, as Kontakt is not forward-compatible.
For those looking to expand their sound without spending a dime, check out the by ProjectSAM, which is a perfect starting point for orchestral scoring. klc kontakt library creator free download exclusive