I opened an old map in GF, looked at it and shut the program down and it locked up so I had to kill the process in windows.  When I then ran the map, it mini dumped.

After eyeballing 9000+ lines of galaxy file In Notepad++ over and over for hours, I finally tracked down the last glitch and corrected it.

In dev mode, I kept getting errors for very simple things but the line entry of the error didn't match --when I would look at that line it was fine. What happened is that it made LOTS of indents and I think deleted one or two lines in my template files and some planet entries. The map ran fine prior to that and no editing was involved--just as clarification. 

Since then, I've reloaded the fixed map (a copy this time!) and closed the program, reloaded and added/deleted planets, suns and phase lanes and it's worked fine even after that.

Just a "Hunh" moment.  This ever happened to anyone else?