My wallet has only 55 MB.
Do you have a backup of the wallet?
I presume, after so many transactions the wallet start to present dificulties to work properly.
Besides, even if you have the private keys of your FUGUECOIN addresses, you have to send the mined coins to yourself from time to time, if not they still belonging to the "mined addresses". So in this case, if you manage to get your wallet opened, you should send "ALL" your coins to a new wallet, using a new address.