Is this how looks wallet?:
http://savepic.net/4578283.jpg

1. Close wallet
2. Go %AppData-Roaming-Nyancoin and move AGAIN all file except wallet.dat to another place
3. Open Wallet, download from first page this topic - https://mega.co.nz/#!FI8ykY7K!yCBoLS6s6z-Wb9C8J5Sa77Ij3aOfoJZ4qLEcDbob1Uk
and...

http://savepic.net/4542443.jpg