Is e*scope supported on the 5 or 6 series MSO with Windows 10 installed?

Yes.  With firmware v1.8 or above, using the web browser access to the Windows 10 version is supported along with TightVNC.  TightVNC must be installed on both the remote PC and the scope.  For the detailed setup instructions, please see the 5/6 series online help manual.

To access the 5 or 6 Series MSO with Windows OS using a web browser, simply type in the IP address of the scope on the URL along with the port number configured in TightVNC's Web access port.  The default port number is 5800.