Wich version of the SDK are you using ?
Check in the command prompt window by typing: muse-io --version
If you get: muse-io 3.4.0 (Build-62 Jul 28 2014 15:31:55) … it´s the latest, and a lot of things has changed.
All [B]/muse/dsp/bandpower/ [/B]paths were changed to: [B]/muse/dsp/elements/ [/B]
Also, the /focus and /relax paths are not available anymore (I don’t know why).
There is still a lot of mistakes and wrong links in the Developer site documentation (hopefully they will fix them soon :).
Don´t follow the links. eg. at the muse-io command line options page (they take you to the oldest versions of OSC paths), instead use the links on the left menu.
In muse-lab, once you “open” the port and get the connection, it will list in the box bellow all the message coming in, and their respective paths.
Once you create a new “visualizer” (let´s say a Scrooling Line Graph) you will also get in the box bellow all the signals available to be plotted (“draw”).
That´s what I got until now, hope this can help.