Today's changes, right from the code...

* v1.0d15.3 -  1/15/92 - Changed clear key handler to call HEClearInternal,
*                        rather than HEClear. This properly updates the dirty
*                        flag.
*                      - Remarkably, the delete key now deletes the character
*                        to the left of the cursor.
*                      - End of record addition with the ASCII side as primary
*                        now works.
*                      - End of record addition (when hex is primary) shouldn't
*                        cause the cursor to move over to the next byte. Now it
*                        activates the new byte's low nibble.
*                      - The overstrike mode cursor doesn't flash any more.
*                      - Insertion mode on the ASCII side now works as was
*                        previously advertised, except for the outstanding
*                        problem below.
*                      - With the ASCII side as primary and insertion mode on,
*                        the cursors don't get updated properly by the
*                        FastDrawHilight code. This will be fixed soon.
