I can't get F2-winds in VRTool with Windows 8.1 on a desktop computer. Extremely annoying!!!
In VRTool Wind-tab/Regatta settings: Server: http://www.vrtoutoulz.fr/winds
With IE/Firefox browser and http://www.vrtoutoulz.fr/winds
the winds show up on my screen without any problems.
It's no problem with F2-winds on my laptop with Windows 7 and all settings in VRTool are the same in these computers