its been a while since i have used planeplotter, however i think you have to enable sharing with the planeplotter network in order to for their servers (planeplotters) to assign a code.
Issue: I cant see my sharecode, it only shows – on About planeplotter.
Did you register your PP instance? That is usually what ‘–’ indicates. If FA bought your license, you may need to sort it out with PP support staff. Have you looked over PP’s website at http://www.coaa.co.uk/planeplotter.htm