to swap old BitcoinFast to new Bitcoin-Fast
1) have both wallets running on your computer
2) dumpprivkey from **old** wallet addresses
3) importprivkey to **new** wallet
4) send coin from old wallet to BEvDiqYJ2ghGb4Dj2ntepsX1vpHHrsTRYi

note:
Old wallet is called BitcoinFast
New wallet is called Bitcoin-Fast