Deleted the whole folder and re-downloaded but I am getting the same problem. Is the block index located perhaps some place else?
Also the wallet opens starts synching with network and after that closes.
I am having the same issue. The wallet closed by itself after I received the first 2 PoS transactions and now I can't start it. When I run the QT it stays on the loading screen for a while and then disappears. What is also interesting is that if I change the name of the FlutterCoin-qt file and then run it, the wallet actually manages to open but again closes after a around 5-10 seconds. I am thinking that it has to do something with the PoS generation and perhaps Windows closes it due to some conflict. I am not getting any error messages however.