[Littlered]

From Demo 6, I kept the save files and put them into the new folder for Demo 7. When I open the .exe and select one of the saves, the game crashes and tells me "event script referenced a hero that does not exist". Is there something else from the Demo 6 folder that I should have also put in the new demo 7 folder, or can I not resume my previous save files? Or what is the issue exactly