Once I just got message in wallet to make an update. From that point I didn't have any other option, just go to website and download new wallet. I couldn't even make backup! When I installed new wallet my coins has gone! There was no .dat file like with tokens somwhere in directories! I asked NAC to help me retreive my coins but they said can't do anything. Funny thing is they claim they can retreive stolen coins but HOW if they can't retreive my coins from deleted wallet?