Please go to the Tools-Settings menu and open Security tab. Enable Protect with Password checkbox and enter your password twice. Press OK and close Settings window.
Please start Multi Room Audio Player and go to the Tools menu, click on the Settings and select Remote tab. Please turn on “Enable remote control” checkbox. You can’t specify an address, this is your computer local address, but you can change a port. After changing the Port, please click “Restart” button.