Hello nood, COGlory and waggywags. Sorry for the time out, and thanks for your support.
Nood, your idea was really nice, but too late, I was already tryed something different and replaced the "last_savegame_backup.sav", so this solution is not there anymore and was not posible to recover. After I look at it with a Hex editor I realize that I can't do nothing now, the file now is just a gigantic zeros inside.
As an idea, would be nice that the devs create a "last_savegame_backup.sav" for each player, (like: last_savegame_backup_sg00.sav) so each player could always recover the game from there.
Thanks for your support, now I will cheat a new char from the cheat menu and start again to take over Calradia. : ))
Dominvs.