Problem with adding new device with zigbee_shepherd_devices: true

Please help me. Please explain me in simple way (I am dumb user) how can I modify devices.js on HomeAssistant supervised to add new device? I am using hassio-zigbee2mqtt add-on and method with zigbee_shepherd_devices: true crashes zigbe2mqtt.

It looks that procdure Using devices.js override in add-on from https://github.com/danielwelch/hassio-zigbee2mqtt#adding-support-for-new-devices is not working…