Main menu "File->Export Database" allows you to export your database to a CSV file (delimited text file). Such text files can be read by most other database programs. You can open CSV files with your spread-sheet application. If the data istn't displayed in clean columns there, try another delimiter with the export options. Try Comma or Semi-Colon.
On the other hand, MP3db uses Microsoft Access as it's database format. Of course you can also open these *.mdb files directly with MS-Access or other programs, that supports MS-Access databases.