Do you still have the original MultiBit wallet and application? I assume you are talking about MultiBit Classic as you mentioned private key export (which MBHD does not support).
If you still have the original wallet and applicaiton, use "tools -> export private keys"... and DO NOT password protect the output file:
You need to enter your wallet password at the top, and then leave the password field at the bottom empty... Select the "do not password protect export file" option:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fiforce.co.nz%2Fi%2F5h4ipcv3.k2l.png&t=663&c=z48VI_wYTp7Hcw)
Note: you don't want to copy the datetime stamp at the end of the private keys when trying to import them into your BCC wallet of choice...
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
This will create a plaintext version of the export file which you will find then contains the private keys in the correct "WIF" format... Ie. You'll see keys beginning with a "K" or "L"... Like this:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fiforce.co.nz%2Fi%2Fg43qfhpr.vun.png&t=663&c=mp-3e1rSrqwLBQ)
If re-exporting them does not work, or you do not still have the original wallet file, then you'll most likely need to try and decrypt the exported file manually... for this you need to use OpenSSL to decrypt the files... I would suggest that you read these two documents:
https://multibit.org/help/v0.5/help_exportingPrivateKeys.htmlhttps://github.com/Multibit-Legacy/multibit/wiki/Export%20and%20limited%20import%20of%20private%20keys