I think it was free for at least 6 months. I did try Win10, hated it, its 100% full on Spy wear from microsoft. Not to mention how more un-user friendly it all is.  So i reverted back to win 8.1, which i have to say i am very happy with.

Also for people posting "it works great on my OS"  I CLEARLY stated, i wanted to hear from Windows 8.1 Users/stakers only.  As it seems like this is the OS that could be the issue.

But, no worries, i will wait for new HTML 5 wallet, hopefully Santa will bring me one.