Hi I've just upgraded our business sticks from Home to Pro.
Get an upgrade key for Win 8.1 and then use the Add features function of Windows to upgrade from home to Pro. Works well and can connect to a domain nicely :-)
I'm about to take the next step and going to to try and get Win 10 pro on the stick!
The Intel Compute Stick STCK1A32FC supports the following Operating Systems:
• Windows* 10 Home
• Windows 10 Pro
• Windows 10 Enterprise
• Windows 10 Education
• Windows 8.1 Retail • Windows 8.1 Pro
• Windows 8.1 Enterprise.
Installation of any of the above operating systems will require a wired USB mouse and keyboard along with a USB flash drive or USB optical drive. The USB flash drive or USB optical drive will need the operating system installation media.