Building the data base fails again and again and  . . .
After appr. 30 min I stopped this by pressing ALT + F4 (!), both buttons to do this in the window are grayed out.
Log file reports
"getWxDataWorker Der Remoteserver hat einen Fehler zurückgegeben: (404) Nicht gefunden."
(= ... Remoteserver returns error: (404))
and reiterates (endless loop!).

What is the reason for this behavior and what can be done to use this really good Plan-G with X-Plane 10 too?
P.s. I use Win7 and X-Plane 9 + 10.