I released version 1.0.6.1 that should have the pristine images in the correct directory, I hope.
However, in your case, what you should do is reboot the game, press 'C' in the menu for "character options". Then insert the scenario disks (from the menu or "alt >", and tell it to "disperse existing group". Then reassemble the group and play again. Your adventurers will keep all their skills and inventory, and the world should reset.