Hello... Today when I started up my Litecoin wallet, it told me that it was unable to start as the Runtime was asked by the Litecoin wallet to terminate in an unexpected way. I tried deleting the blockchain and redownloading, but whenever it gets to a certain block, it throws that error again and refuses to startup. Using a different wallet.dat seems to allow litecoin to run just fine, so how do I go about recovering my private keys from a wallet.dat that doesn't want to work? Thanks