Open Powder Toy, go to the save browser. In the search bar, type history:1163722 - this will show previous versions of the save. Open a version that hasn't been blown up and save as the same name to overwrite the save.
Changing your password is always a good idea, as is locking your computer or logging out of TPT when away from your computer.
I think that that's what Lockheedmartin did, and he didn't find anything out of the ordinary.
wierd...
a to hacker lob admin nie przejmuj sie my wsyscy muwili copied a to darek profil mi grzebie i daje mi copie