Windows Edition Converter
Windows Edition Converter
Choose your current edition and the edition you want to upgrade to:
Home → Pro via slmgr + HWID
Use the Pro generic key VK7JG-NPHTM-C97JM-9MPGT-3V66T, then activate with MAS HWID.
Full MAS download and the irm https://get.activated.win | iex one-liner are on the home page.