Possible to enable DirectX 9 renderer in launch options?

[Sammarald]

@InterAction_studios

DirectX 9 is out, DirectX 11 is in: New pixel shaders should improve performance (particularly during large explosions or other intense particle effects).

• Sadly, as a result of this change, Windows XP is no longer supported. Windows Vista support is also probably broken – please report experiences here.

the change to DX11 had something to do with pixel shaders and performance improvements, not sure if DX9 could still work