The user guide says: "Upon running ePADD, the application icon will appear in the Windows Taskbar. Right-click on this icon at any point to open an ePADD window or to quit ePADD."
This is not appearing for me (Windows 7). The result is that if you close your browser window, starting the application has no effect. I figured out that the workaround is to choose the localhost address in the browser, so it's a minor issue.