How to change access key or worker name on msOS?

First stop your miner with mstop command. Then to change access key and/or worker name on your msOS rig, you need to call mworker command.

Where accesskey is your new or current access key and workername is your new or current worker name. This command will change the values in config.js file. After you do that, you can start the miner with mstart command.