Thank you for the clarification.
Unfortunately, we couldn't reproduce the issue - it's possible to connect to a remote Host machine in the Full Control mode using command line parameters. Could you please clarify if you're running the following command, i.e. without the "name" parameter, but just its value?
rutview /navsystem /fullcontrol
If this is the case, then, indeed, the Full Control mode is not initiated, it just opens the Viewer main window even if the password is saved for the remote connection entry. Could you please try running the following command instead and see if it works this way?
rutview /name:navsystem /fullcontrol
Please let me know if the issue persists.