Well folks, I figured it out. I was only using the Method C(pyramid) which doesn't have any radius or smoothing parameter adjustments. I thought the default - and unless I unwittingly changed it, Method C must have come up the default - would be the best choice to use as I got to know the program.

I'm a newbie with an embarrassingly elementary question. On the parameter tab/page I'm invited to adjust the radius and the smoothing parameters for best results. I cannot see how to adjust them. On the right side of the workspace are, from top to bottom, the run options button, a list of the files ...