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.
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(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