This transaction shows that you have successfully called
TheDAO.approve(...), the first step described in How do I convert my The DAO tokens into ethers using the withdrawal contract after the hard fork?.
What is remaining is to call the second step
You cannot manually resume with MyEtherWallet as it executes both
theDAOWithdrawal.withdraw(...) in the one go.
TheDAO.approve(...) function can however be called more than once, so you can just re-run the MyEtherWallet Withdraw your DAO Tokens for ETH. You will end up paying ~ 0.00095508 Ether ($0.01) extra as this is the transaction fee for calling
TheDAO.approve(...) a second time.
Or if you have the Ethereum Wallet installed and synced, you can just run the Execute The Withdrawal Contract Function section under Withdrawal Method 2 - Ethereum Wallet described in How do I convert my The DAO tokens into ethers using the withdrawal contract after the hard fork?.
What I don't understand is why MyEtherWallet only executed the first
TheDAO.approve(...) part and not the second
theDAOWithdrawal.withdraw(...) part. The
generateAndSendWithdrawTx function in https://www.myetherwallet.com/js/etherwallet-master.js executes both parts in the same function.