If you see this message when opening your wallet, follow these steps:

1) Close your wallet (if it's open).

2) Go to C:\Users\UserName\AppData\Roaming\HomeBlockCoin (Make sure to choose "Show hidden files, folders, and drives" on Folder Options so you could see the folder)

3) Copy wallet.dat file (this is where your coins are saved if you lose this you'll lose your coins, DO NOT FORGET THIS!!) and move them to a different location in your computer.

3) Delete HomeBlockCoin folder.

4) Open your wallet, you will see that the HomeBlockCoin folder has been created again.

5) Close your wallet again and move the files wallet.dat that you saved before to the HomeBlockCoin folder, replacing wallet.dat.

6) Now start your wallet again.

That's it!