Legacy control software for vengeance 1500?

I was having some trouble with my 1500 headphones and skype... so I "upgraded" the drivers and control panel software(2.0.26). Well, I really HATE the new version of the software (no mic loopback controls, and the 7.1 mode just puts a really crappy reverb on everything). Anyway, I would like to get the old software back... anyone know where I can do this? One of the reasons I bought this headset was for the mic loopback function and now I don't have that.... :(