You can change your worker's name directly from your workers' list by clicking on the edit (pencil) icon.
If your worker is online and syncing with the minerstat dashboard, you can just rename it on the dashboard and your config.js on the rig will be automatically updated.
If your worker is offline and is not syncing with the minerstat dashboard, then you need to follow the next steps:
mstop
to the console.mworker ACCESS_KEY WORKER_NAME
to the console where ACCESS_KEY
should be replaced with your access key and WORKER_NAME
should be replaced with your new worker's name (e.g. W002).mstart
to the console.ASIC Hub monitors groups and not worker's name, so all you need to do is rename your worker on the dashboard.