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We would like to ask all Bitcore users to slowly but surely upgrade to the new system.
To do so, please follow these steps:
1. Open your Bitcore core / Bitcore-QT wallet.
2. Create a backup of your wallet.dat and store it in a safe place. For example a USB-Stick that you later put in a safe-deposit box.
3. Download the latest wallet and replace the wallet.dat that will be created on startup with your old wallet.dat
4. Bitcore-QT will automatically create new public keys for your private keys, starting with 2xxx instead of 1xxx.
5. It is important to note, that you can only use your old public keys to send to other old addresses and vis versa - you can send only to the new format from the new format. The address formats are not interchangeable.