Thanks to your help I just found out what was wrong.
Like you said, the files were encrypted but while installing the new version on my computer i deleted the password. After putting in the password and setting it to encrypt the files it all magically appeared
Hey, I see I have a similar problem. My stupid ;) sister decided to delete MPhE from my computer (I used a veeery old version) but i have all my .dat files. Now I see they are different from this version's files and when I put them in the folder now every time a window pops up "could not debug".