I encrypted the wallet, how do i decrypt it now?
You can't decrypt a wallet but you can unlock it so that it will stake once you're synced. Go to Command Line Banking and type:
walletpassphrase [Your Password here] [Time to unlock in seconds here]
(excluding square brackets)If you have a lot of transactions to stake it may be an idea only unlocking for 5 minutes (300 seconds) at a time as your wallet can become non-responsive whilst staking.