I am using a Dell M3800 on Win7. I can install 1.7.4 but then I can't connect my DDJ-SX2 (I think the SX2 came out after 1.7 so maybe that's why).
But installing any later versions does not work. 1.9.9 and .10 both install just fine but won't launch into the SDJ GUI. SDJ stops responding and I have to manually kill the app in the "program not responding" dialog box.