I still have an email I need to send you, unfortunately unforeseen family issues kicked me in the butt this last week.
Anyway, I use Windows 8.1 on all my HAM Radio PC's here in the shack including on the Tablets.
I use all the software you mentioned and more without issues with Windows 8.1 Any quirks with are generally documented well on the relevant software's forums and to be honest I don't recall any issues that have caused me to dig too deep. Normally user error has been the cause of any stumbling blocks I have experienced.
(I'll get that email to you this weekend! I promise!)