The main window has a three panel display that will show you the catalog library, the catalog details and the information you have previously entered about your files; also, you can create a new catalog. 

The Catalog Library window displays the catalogs that are available, giving you the possibility to add new ones or to delete existing ones. 

In addition, by typing a file name, you can search for a specific file when you know exactly what you are looking for. 

MP3Clerk offers you the option of exporting your catalogs to other formats, depending on your necessities. 

When are not interested in too many details about your files, you can adjust the columns displayed in the main window.