Click to show a File Open dialog. Select the configuration file of your choice and click "Open". Your K3's configuration will be restored from the file you have selected.
This process takes from 30 seconds to a couple of minutes, depending on the K3's CONFIG:RS-232 speed setting.
Do not modify the configuration file between Save and Restore, or Restore may fail. If you wish to create a configuration file that contains a different configuration, use the K3's CONFIG menu to make changes, and then use Save K3 Configuration As to save the new configuration.