The MPLAB® Harmony Configurator (MHC) graphical user interface extends the functionality of the MPLAB® X IDE. Before using the MHC, you need to install it.
Open the Plugins Window
In the MPLAB® X IDE, open the Plugins window by selecting from the main menu: Tools ▶ Plugins.
You must use the MHC plugin version bundled with the specific version of Harmony you are using. Do not assume the latest MHC plugin version (found by selecting the "Available Plugins" tab) will be compatible with your Harmony version.
If you are using multiple versions of Harmony on one computer, you will have to replace (uninstall and reinstall) one MHC version with another. Another alternative is to install different MPLAB X IDE versions on the same computer and install a different MHC plugin version in each IDE.
You can verify the plugin installed successfully by verifying the "MPLAB® Harmony Configurator" option is shown in the "Tools ▶ Embedded" list.