MultiBit Classic Recovery Tutorial: Files, Keys and Migration

To recover a MultiBit Classic wallet, first preserve its backups, identify the file type, then choose an export or decryption method that matches it. Once usable private keys are available, a supported Bitcoin wallet can move the funds to a new wallet.

1. Find and preserve the wallet backups

The original configuration reference lists %APPDATA%\MultiBit on Windows, ~/Library/Application Support/MultiBit on macOS and ~/MultiBit on Linux. A custom configuration, portable installation or another user account can change the location. Copy the whole folder and keep the originals unchanged.

2. Distinguish wallet data from exported keys

A .wallet file is wallet data; a .key file is a private-key export. The original export specification describes a text format with one key per line, optional creation timestamps, and comments beginning with #. A password-protected export must be decrypted before its keys are usable.

3. Export or decrypt the appropriate file

If Classic opens, its Tools → Export Private Keys function provides a key export. If it does not open, use the troubleshooting guide to identify your backup before choosing a tool. The documented OpenSSL export format applies to Classic key exports; it is not a universal method for Classic wallet data or MultiBit HD.

4. Move recovered Bitcoin into a new wallet

Importing retains the old private keys. Sweeping creates a transaction to a destination in the new wallet and incurs a network fee. Electrum documents Wallet → Private Keys → Sweep; check the destination and transaction details before sending. Its official instructions explain this distinction.

What if the MultiBit password is forgotten?

Record what you remember about the password and the exact error message. Whether candidate testing is realistic depends on the file, encryption and quality of the clues. Contact KeychainX for a case assessment; no universal completion time or recovery guarantee applies.

Frequently asked questions

Do I always need to reinstall MultiBit Classic?

No. A usable unencrypted key export can provide the private keys without the original application. A wallet data file needs a compatible extraction method.

Can I open every .wallet file with OpenSSL?

No. A filename does not identify the encryption format. The historical OpenSSL instructions describe a Classic private-key export, not all wallet files.

What is the difference between importing and sweeping?

Importing keeps using old keys. Sweeping sends their spendable Bitcoin to the destination wallet through a new transaction. Check the destination and fee before sending.

Does a password error mean recovery is impossible?

No single error establishes that. Preserve the original file and check the application version, file type and password clues before choosing the next step.