If you click on "start program" there should open a new tab in your browser with a "New graph" button in the center.

If this does not happen, then maybe

  • your java plugin is too old,
  • you did not allow the applet to start, or
  • your browser blocked the java plugin.
  • you have to add this website ( as an exception in the security settings of your java control panel.
  • you should visit the website use-java-plugin-to-view-interactive-content.