The Parameters page allows you to set parameters passed to the Sensor at execution time. These include parameters that are always passed to the Sensor ("forced parameters"), and parameters that are passed and have choices for the values passed ("startup parameters").
To edit forced parameters, the Sensor must be stopped. If the Sensor is running, stop it. Then edit the forced parameters field and click Update Forced Parameters. The next time you start the Sensor the forced parameters will be applied.
To edit startup parameters, choose the value you wish to use from the dropdown box for a parameter. Then click Update Startup Parameters.