Thanks again.
All those screws that hold the frame are tight on mine.
I found out on
page eleven here;
http://www.ca.kohler.com/onlinecatalog/pdf/112692_2.pdf
that the final adjustment of this door can only be done during initial installation. After that, and when the silicone is up, well, your SOL
I ended up finding a small washer, cutting a wide slit in it, and slid it under the plastic hinge retainer lifting the whole door up enough so that it does not snag against the bottom rail.
Works fine (right now).