Jean-Luc,
That appears to have done the job. The problem, I think, was, in the C:\RealityXp that initially was established? I renamed that folder, and then had the RXP installer create the new folder (C:\RealityXp), and then everything was automatically installed. The xplane manual was downloaded, and the plugin has been established in Xplane, and I have created a flight plan. It appears to be working. Now to read the manual.
Thanks,
Kent.