Thank you. Maybe that's the problem. AFTER changing column headings (del, add, resize) - didn't set that as default. Did set new col selections as default, but not the resizing of them.
That I recall, no other app ever req'd a step - "set as default," after make GUI config changes. Just "Save," if even that. Definitely not for saving resized columns.
It's OK - if there's a reason req'g clicking Set as Default (people want temp changes, but want it to revert to factory defaults), but it is unusual, so probably warrants an FAQ & prominent mention in the Help file, how to do it. (if already there, I missed it)
Another thing I noticed - haven't quite figured exactly when / how it happens. If R click column headings to add column AND remove a default one (say, attrib), I guess Save As Default must be clicked before closing screen, where changes were made.
Else, the attrib. or other "original" default columns reappear. I guess this applies to ALL UI changes, in order to save them?