My library doesn’t appear in the Library Browser.
Older versions of Kontakt do not allow unlicensed libraries (custom or non-Player licensed products) to be added to the “Libraries” tab. However in more recent versions, it is possible to add them to the newer Library Browser view. Here’s an article that explains how to do this.
How do I relocate an Embertone library in Kontakt?
Here is how to safely relocate your library: https://support.native-instruments.com/hc/en-us/articles/210278605-How-to-Move-a-KONTAKT-Library