Apologies, didn't see this until now.
Click on the Object, Select the "Appearance" tab within the "Object Parameters" box.
For MR 4, just look below on the Appearance Panel to find "Smoothing." The default value is "60.00." Increase this value for more smoothing.
For MR 5, first click in the "ADVANCED" box to open up this panel. Then look down in the Panel for the Smoothing parameter.