OK. Click on the "Finish" button, and let the current wu complete (with no new wu).
In the upper right hand corner, select "Advanced" or "Expert", then click on the "configure" button at the left upper corner.
Click on the "Slots" tab. Your slot types will be listed. Click on the slot you want to change, and in the lower right hand corner click on the Edit button.
Click on the smp type, instead of the uniprocessor type, and keep the number in the smp selection as -1. That lets the client select how many cores to use.
Save that and pause just a second to let the client re-write the config file, and restart.
That should do it.
