Good thing I was going to download your product. I looked on the product website. I didn't see windows 8/8.1.
Windows 8 has fundamental core changes which we will not support.Windows 9 is not going to be any different from windows 8. By fail you mean about the start button and the metro ui?
Again i STRONGLY recommend NOT to run this software in any other OS then explicit Windows 7.There is not going to be win 9, it is Windows 10 .
Btw; I run it on Win 8.1 and it work (or it looks like it)