Hi guys,
I used bitcoin-qt as my bitcoin wallet and I forgot to setup a password

So today I checked my wallet and a very small amount of bitcoins were stolen:
https://blockchain.info/de/address/1CPEdjFu6TaZpPFGQ81zHaW7prtJ1pk8LVIs there any chance I get these BTC back? Or do I have to pay to learn the lesson?
After that, I moved to multibit and saved it on several USB-Sticks with a strong password using KeyPass obfuscating. Is there anything else I have to take care of?
Thx for your help!
Regards