1) Move the library folder on your computer.
2) Reload Kontakt to find a "Locate" button on the Kontakt library, in the libraries pane. 
3) Click on the Locate button outlined in green above. This will raise a pop-up which is pictured below.
4) If you know where the library folder was moved to, choose Browse for folder which is outlined in green above. Clicking this will bring up a browser window where you can browse to the library folder.
5) Select the library folder as pictured below and confirm. You might be asked for your computer's admin password in order to make changes and then the library should appear in Kontakt.
