How can I delete all the data in my database?

The easiest way to delete all the records in your database is to choose Zap Table from the Utilities menu.

Note that you can also tell CatBase to delete all the records in a table into which you are importing data. In your Import Style, go to the Updates tab and select the "Delete all records in the table before importing data" radio button. This method is handy if you're going to start with coompletely fresh data each time you import any data.