The program pulls the Windows name from this registry key
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ and then ProductName
Check that registry key and see if it says Windows 9, if it does you may want to change it back.
(Curios to what changed it on your system)
On my Windows 8.1 pro the productname shows "Windows 8.1 Pro with Media Center" (I have the media player extras installed)
Shane