I am using Windows 10. I have tried to install version 4.3, but I always get the error message "Unable to create the user-data storage folder at: 'C:/Users/MY USER NAME/AppData/Roaming/Flightgear.org'." MY USER NAME is a name containing the German "ö" sign because of my respective user name registered in Windows. The "ö" is replaced with a strange sign in the error message => obviously Flightgear does not recognize the German "ö" in the path correctly, which seems to cause this error message.
I thought that this problem has been resolved with UTF-8 compatibility of version 4.3, but it does not seem true in my case.
Does anybody know how to resolve this problem? Renaming the user name folder is a nightmare in Windows 10 and I would like to avoid that if possible. Thanks a lot in advance!