Hi Gurinder,
I once requested Optisystem v.12 because my system at that time did not support windows 7 or 8 and on the other hand, newer versions than v.12 should be all installed on W7 or 8. I was informed via email that Optiwave does not provide support for the older versions of its softwares. BTW, to my experience, there’s almost nothing u can do in the older versions that u can’t do in the newer ones.