When quickscore+ is first installed, it contains no data. In order that you may quickly explore the features offered by the app, the Preferences screen provides an 'Add Sample Data' option.
Clicking the option will cause the app to be populated with 2 players, a golf course and some completed rounds. When this data is no longer required, click the 'Remove Sample Data' option to remove all the data. Alternatively, the sample data may be selectively removed by using the normal delete functionality within the app.
Note: Data may be manually added to the sample data but this may be deleted when the sample data is removed (e.g. if new rounds are created using the sample golf course then these rounds will be deleted when the sample golf course is removed).