If you have any sync issues please do following:

Close you wallet
download a wallet with latest checkpoints
Go to Start -> Run (or press WinKey+R) and run this:
%APPDATA%\BlitzCoin
delete everything BUT LEAVE wallet.dat
create new file: BlitzCoin.conf and add:
server=1
rpcuser=USER
rpcpassword=PASSWORD
addnode=cryptexplorer.com


start your wallet again and it should sync to the right chain


Windows wallet, checkpoint block 3150:
https://docs.google.com/uc?id=0B3lBEhr0wF7qZUgtV1dIWU55Rkk&export=download
https://mega.co.nz/#!l9xjkIQB!QknG31f4ZHTJiWQBryvtcSETkigDghT1mmkK0FDsXUA