[Note: I don't work for Stardock, I'm just bored.]

I'm not able to reproduce.  I am able to confirm that the After save is corrupt and crashes my game when I load it, so you are indeed having a problem.  However, I killed the ogre with the level 6 champion, quicksaved right after, closed the program, relaunched, and successfully loaded the quicksave without issue.

About your Before save, though.  You don't have a level 5 champ.  Near the Ogre, you've got a level 4 (I think that's your sovereign, though) and a level 6 champion, both of which can kill the Ogre, neither of which can reach it without ending two turns first.  There are also a few decisions that have to be made between loading and killing the Ogre that could impact whether or not the save game gets corrupted.  If you can, produce another save game where you have made the choices you made, and you're ready to kill the Ogre.  Also, if you've got both the level 4 and the level 6 close enough to kill it, let us know which one to use if it maters.