You need to use an Aero theme under Windows 7 so as AfterDPP works correctly. If you use a basic theme, then some corrupted displays may occur.
To see the program icon in the notification are, you need to enable it yourself. Clic with the right mouse button on an empty area in the task bar, then choose propreties then Task Bar tab then customize button. Then enable the icon and notifications display for AfterDPP Plugin application.