This is what most producers are looking for when they search for an "Add Library tool." Because Kontakt 6 and 7 changed how libraries are displayed, many older libraries disappear from the menu.

These libraries come with a serial number and appear in the "Libraries" tab with a dedicated wallpaper. Orchestral Tools Helpdesk Open Native Access and log in to your account. Add Serial

If the official link is down, the next top option is community-maintained mirrors. hosts a verified copy of the tool (search for "Kontakt-Add-Library-Tool" – look for repos with 50+ stars).

: Navigate to the folder in the Kontakt side-pane and double-click the .nki file.