Within the home directory (~), there will be folders of different applications including both nodejs programs and node-red programs.
The folders for node-red programs will contain the JSON file that is in the node-red program.
The folders for nodejs programs will contain config.json files that users can use to change the settings for the programs.
The folder Scripts will contain the scripts that the autostart files will use. They contain the 3 node-red instances and all environment variables can be adjusted there.
The autostart files are located at ~/.config/autostart and all the modifications to them can be made there as well.