Good question. I didn't think of that. I checked via dxdiag and it says I have DX11, even though I've repeatedly downloaded and installed DX9 directly from Microsoft's site. Now, doing some more digging I also found this version. Which one should I use?

I figured I could uninstall DX11 and install DX9, but I'm reading here that there's no way to manually uninstall DX11 from Windows 7 unless you go into the registry, and that deleting it "it is not recommended. Doing so may cause errors or reduced system performance".

What should I do?