Yes, I did, but at 1,1,1 setting, it seems like it's 1.5-2 pixels thick. And if I zero those values — Radius, Offsetx/y — the shadow is thick on the bottom and right sides, like a shadow should look! But a simple border would fix this.
KEYBOARD SHORTCUTS (Pretty please?)
(1) A keyboard shortcut is needed for the Add Border feature as well! ALT+B or CTRL+B perhaps?
(2) Consider adding a keyboard shortcut for the File > Save Image As option. Maybe ALT+A or CTRL+A.
(3) One last (small) thing: the Preferences dialog does not close with the ESC key, assuming I want to cancel my changes. That would be nice, though not necessary.