To use the WbWrkGUI, you first must download the GUI (Graphical User Interface).
To download the WbWrkGUI, click on the purple down arrow at the bottom right of the page.
The file is an Executable Jar File, which requires Java. If the GUI does not work, update your version of Java http://java.com/en/download/index.jsp.
You should see the Welcome Screen of the WbWrk GUI that looks like this