Thanks Jason. I didn't see the EndPoint icon in the Taskbar as it is on my Win 8.1 machines so I wondered what the deal was. I also noticed in the EndpointProtectionAgent.log these lines:
EP version 126.96.36.199 is already installed.
Expected Version 188.8.131.52 is exactly same with installed version 184.108.40.206
In Win 10, The Antimalware client version is 4.8.10122.0.
Maybe in RTM the versions will line up perhaps? I sure wish I had windowsupdate.log in Win 10!