Before doing anything. DO NOT USE the sd card your node is currently running on. Get yourself a blank sd card incase there's any issues, you can just pop your original sd card back in.
Files to download:
pi4.zip nodeupdate.zip template.zip
DON'T FORGET TO PORT FORWARD to the local ip address and port number used.
First use winSCP to log into your current node that's running. Open up iax.conf to get your node password.
/etc/asterisk/iax.conf