In the main window of the utility, select the target CHARON service ("charon-3100" in our example) and press the "Service" button (labeled with yellow on the screenshot below):
Press the "Stop" button in the resulting dialog box:
The CHARON Service can be Stopped using the shortcut on the Windows Task Bar.
Open up the "CHARON Service Manager" system tray menu, select the service you are going to stop and click on the "Stop" command:
Please note: before stopping the CHARON-VAX/PDP11 service, shutdown the operating system running in CHARON-VAX/PDP11.