Look for LuniaClient.log in the folder you put lunia.
After you fatal, scroll down towards the bottom and it should say why it crashed. (The file can get rather big, so you'd want to just reproduce the error and look at the file without doing too much other stuff.)
Human history is the story of complaisance. While disaster is fresh in our memory, we take precautions. But as the memory of disaster recedes, we start to take risks.