Ooops !
Forgot to mention: to get free access to the WX-info move your mouse over to the "Wetter"-button. In the pop-up window, press the "Flugwetter aktuell" area. A new window will appear. Subsequently activating the "IFR-Piloten" line will prompt you for username and password. Here we go:
user: flug
password: wetter
Cheers
rtt