I wish I could report success.
But I am still not able to connect from iPad Pro or iPad 4 both running 10.3.3.
Remote Desktop is working in the Windows 7 64bit PC and I can connect to it using Remote Desktop from another PC running Windows 10.
I can also connect to the PC from my iPad using Microsoft’s “RD Client” free remote connection app.
But iC Pro does not establish a connection. I reinstalled iTunes to make sure I have the correct version of Bonjour and also updated the Steinberg SKI add on. Still nothing.