This menu option allows you to select any of four different types of files to use as the default, or to edit or browse their contents. These file types are as follows...
•Fixed Stars – files containing selections of fixed stars or other astronomical objects
•Arabic Parts – files containing lists of Arabic part definitions
•Asteroids – files containing lists of asteroids
•Extra Bodies – files containing orbital elements for various bodies
See Using the File Manager for more details on how to select, edit and use these file types.