Please first make sure your are running last wallet version 1.0.4-beta "Can be found on our website"

- Backup your wallet to My Documents as XUN1.wallet or any other name.
- Delete the files inside UltraNote folder from C:\Users\USERNAME\AppData\Roaming
- Download the blocks from this link https://drive.google.com/open?id=1BaO0kkiF8U23XfJQnYlSnS6S9pGy3Fsm
- Extract the folder and copy the files inside it to C:\Users\USERNAME\AppData\Roaming\UltraNote
- Start your new wallet and open the backup file XUN1.wallet

* Please change USERNAME to the system user you have.