In order to use MPLAB Harmony Configurator with MPLAB X IDE V6.05, the necessary files must be downloaded and installed into MPLAB X IDE V6.05.

Download the necessary files from the URL below.

https://github.com/Microchip-MPLAB-Harmony/mplabx-plugin

Access the URL and click "Code" → "Download ZIP".

After downloading the ZIP file, unzip the ZIP file.

After unzipping, there is a .nbm file. Install this file in MPLAB X IDE V6.05.

The installation method is as follows.

First, launch MPLAB X IDE V6.05.

When MPLAB X IDE V6.05 starts up, click "Tools" → "Plugins".

The Plugins screen will be displayed, so click “Downloaded” → “Add Plugins”.

The file selection screen will be displayed, so select the .nbm file you downloaded earlier and click "Open".

Check "Install" of MPLB Harmony 3 Launcher and click "Install".

The Plugin Installer will be displayed, so click "Next".

Next, the License Agreement will be displayed, so check "I accept the terms in all of the license agreements" and click "Install".

After the installation is complete, check "Restart Now" and click "Finish".

After a while, MPLAB X IDE V6.05 will start up again.

You can use MPLAB Harmony 3 Configurator by checking "Tools" → "Embedded" in MPLAB X IDE V6.05.