When no ZWave dongle is attached (or is broken), Node-Red server stops.
This scenario happened to me and others a couple of times.
The user is not informed what happened.
Not everyone Node-Red user can solve this issue.
The proposal is not to call "process.exit()" in method driverFailed() in file "10-zwave.js".
It would be nice if the error message could be shown in the node info (instead of "disconnected").