I do not install the Windows Pro version on anything, this was something Microsoft did as part of the Windows 10 demo version.
I have not tried Windows 8.1 Home or Windows 10 on the MS-1, so I do not know. It is a simple experiment, but I do not have any MS-1's here to check. I have a blank SSD drive to install to load a fresh copy of Win10. It can be done without modifying the existing SSD boot drive for Wndows 7.
If you would like me to check your MS-1, I can with Windows 10 until April 15.