The only thing that ended up working for me was the manual way you indicated in another thread:
"Try here: Copy to browser....
ms-windows-store:WindowsUpgrade"
I'd be concerned if I was MS and others have this same issue. It shouldn't be this clumsy. I called the Surface support number and after 2 hours on the phone they couldn't figure it out either. If it weren't for your instructions I'd be you know what...