Install Multibit- Download the 0.5.17 release of Multibit from:
https://multibit.org/releases/ (Multibit removed support for Blockchain Wallet ".json" file starting from version 0.5.18)
(Upgrade to latest version after ".json" import)
- Install and launch Multibit
- Click "Next" at the welcome messages
- Accept the agreement and click "Next"
- Confirm installation path and click "Next"
- Select program groups and shortcuts then click "Next"
- Click "Next" when installation finishes, and then "Done"
Import backup into MultiBit- Launch Multibit
- Select "Tools | Import private keys" on the menu
- On the new "Import Private Keys" tab, click on "Import from…" button
- Select "Blockchain.info (*.json)" from the pull down menu at the bottom
- Browse for your "wallet.aes.json" backup file and press "Open"
- Enter your wallet password in the "Password" field and press "Unlock"
- You may need to enter a second password if your wallet is double encrypted
- Click "Import Private Keys" button
- Will display "Importing private keys… completed successfully" when done
- Imported addresses are listed under the "Request" tab
- Wait for Multibit to synchronise the transactions