How to start DbVisualizer depends on the operating system you are using.
In the Start menu, select the DbVisualizer menu item.
Open a shell and change directory to the DbVisualizer installation directory. Execute the dbvis program
Double click on the DbVisualizer application or the DbVisualizer.app application bundle.
You can also start DbVisualizer with the bundled script files, please see the GUI Command Line Arguments page for details. For tasks that do not require a GUI, such as tasks scheduled via the operating system's scheduling tool, you can also use the pure command line interface.