You can use this open source tool to retrieve your CarbonWallet private keys.
https://carbonwallet.github.io/carbon-wallet-recovery/
In order to do this you will need the data from your wallet backup that you either printed out or saved somewhere. It looks something like this.
You can download this github code and use it locally or you can trust github and access it with the link below.
To complete this recovery process, you will need the following information:
- 1 BIP38 Key (Begins with a 6.)
- Your Carbon Wallet password
https://carbonwallet.github.io/carbon-wallet-recovery/
You can then run up a web server i.e.
python -m SimpleHTTPServer
Download the files and access index.html from your browser.