How do I delete current library

I want to delete current library and setup new one

To delete a library click on the trashcan:

To add a library click on the ‘Add folders’ button:

I think “Audirvana Library” refers to the metadata repository, not the music source folders.

On the Mac, it is ~/Library/”Application Support”/AudirvanaDatabase.sqlite. While Audirvana is running there’s also a journal file.

Not sure what happens if you just remove those files (or move them someplace else). I suppose Audirvana will build a new database on next start. You may also have to register the license or validate your account.