Related question: Upgrade Windows 8.1 Enterprise to Windows 10 References the evaluation and answer recommends a managed upgrade.
I have a Visual Studio Professional with MSDN subscription. This gives me access to the Enterprise edition of Windows 10 (and Windows 8.1). I currently have Windows 8.1 installed on a home PC. I would like to upgrade to Windows 10, without having to wipe my drive and/or do a clean install.
https://technet.microsoft.com/en-us/windows/dn798755.aspx?ocid=wc-tn-eval#administration has instructions for doing an in-place upgrade of Enterprise edition via System Center, but because this is a home PC it isn't managed via System Center so that option doesn't work for me.
The instructions here https://www.microsoft.com/en-us/evalcenter/evaluate-windows-10-enterprise appear to be specifically for the evaluation, not for a full single-machine upgrade. Also it says:
We do not recommend that you install this evaluation if you are not an IT professional or are not professionally managing corporate networks or devices.
Note: I don't mind moving to Windows 10 Pro if that is an easier option as I don't actually leverage any of the Enterprise features.