In the main page for an application, you will see a status bar in the header. This status bar allows you to start, stop, and restart the application in question.
Start the app
Click the Start button, circled in red below. You should get a status message, and the Status circle should change to green.
Stop the app
Click the Stop button, circled in red below. You should get a status message, and the Status circle should change to red.
Restart the app
Click the Restart button, circled in red below. You should get a status message, and the Status circle should change to green. The service should be stopped if it was running, and then restarted.