Launch SQLiteStudio, or some other graphical tool for managing SQLite databases.
In SQLiteStudio, on the Database menu, choose Add a database, or press Cmd + O.
In the Database dialog, click on the folder button to browse for an existing database file on the local computer. Select the Northwind.db file. Optionally, click on Test connection to see the green tick, as shown in the following screenshot, and then click on OK:
Right-click on the Northwind database and ...