How do I unlock, decrypt, Bitcoin wallet? I'm new to Bitcoins and I downloaded the new beta version with the encrypted wallet.  I encrypted my wallet but I have no idea on how to decrypt it.  It is locked.  How can I unlock/decrypt my wallet?

Moreover, I added a few new addresses for payments but I would like to delete some of them.  It won't allow me to delete them, however.  How can I delete addresses I never used and no longer need?
Close Bitcoin
Find your wallet.dat
Rename to wallet.old
Start Bitcoin
Copy the address from the new empty wallet
Close Bitcoin
Rename (new) wallet.dat to wallet.new
Rename wallet.old to wallet.dat
Start Bitcoin
Send all your Bitcoins to the copied address from new wallet
Enter your password
Close Bitcoin
Rename wallet.dat to wallet.old
Rename wallet.new to wallet.dat
Start Bitcoin
Your new wallet should now be unencrypted and all old addresses gone.


This solves both your problems.