It will be the one with the most recent modification date. Anything you do in Music should update it. Music always opens the last library that it opened unless you use the option-start-Music method to choose or create a different one.
It will be the one with the most recent modification date. Anything you do in Music should update it. Music always opens the last library that it opened unless you use the option-start-Music method to choose or create a different one.