Rule 1 - always have a hard copy before you update the terms table.
 
This morning when I was editing the 2 item in the terms table, I deleted the description and had intentions of leaving the description blank until we needed to use it again.  Pressed the enter key and could not even save the table.  The program automatically closed.
 
Not only did it close the file, it wiped out the rest of the terms table!  (items 3 through 20)
 
Work around is -  if there is a line item in the body of the table that is not going to be used, you must enter a description like UNUSED, otherwise the program will not allow you to continue to tab through the rest of the table and save it.