Originally Posted by DjNDB
Please make a backup copy of your savegame folder:
%USERPROFILE%\Documents\Telltale Games\The Walking Dead
Then try the "restore previous version" feature (right click, "properties", "restore previous version") on the original.
Not working for me, been making backups of the save game folder after completing each episode as I had issues with the pref.prop file before when completing episode three. My game hasnt overriten the file just not loading decisions from past episodes. More info HERE