Connect your Meshtastic device to your computer via USB.
Open the Meshtastic Web interface: client.meshtastic.org
Click "New Connection"
Click the "Serial" tab, then click "New Device"
Click the COM port your device is appearing under, then click "Connect".
Click the newest Serial ID that has appeared in the Connect New Device Window.
Click the Config option in the Navigation Menu.
In the Radio Config Menu, click the LoRa Tab.
Select the region you are operating in and then click the save icon in the top right corner.