Make complete working copy of existing Node-RED install

[Steve-Mcl]

PS, There is another way...

you can start another instance WITHOUT copying anything in just by creating an empty folder & starting node-red with the correct command line parameters.

This would fire up another instance but completely EMPTY - then you could migrate elements of your first flow piece by piece.

You can run even more instances for times when you are testing and trailing stuff.
Just remember to set a different path and port number.

This thread is clearer