Demo Slide Show

I just downloaded the latest version of fotomagico 4 to my IMac and Macbook Pro and when I did tried to open the “Demo Slide Show” I kept on getting a message “Can’t open it because it is empty” this was on my IMac. I was able to open it on my Macbook Pro for awhile and to my surprise now not even on this as well why this is happening? How could I be able to recover this files?? Can anybody help me please? Regards Clem