Installed plug-ins can be found in the MPLAB® X IDE main menu under Tools > Embedded > …. When this menu item is selected you will see a list of the installed and active plugins
After installing a plugin it may be necessary to restart MPLAB X IDE before the plugin is run for the first time.
If you need to work with Microchip Support staff directly, you can submit a technical support case. Keep in mind that many questions can be answered through our self-help resources, so this may not be your speediest option.