Yes, i think most of us did :-)
Luckily i consider myself as an experienced user (i'm coding too), so i guessed, that there is a small chance that some data is stored in temporary folders (many programs are working this way).
In the meantime i found this topic: that made me not to give up my hoping
At the moment, i'm fixing the machine (mainboard issues) and after that i will start it, NOT open PDN and do my best to find the files and try to restore them.
I'll report when it's done successfully or not.