With anything after ZenPhoto 1.1.3, upgrading is super easy!

   1. Backup your MySQL database.
   2. Remove the “zen” or “zp-core” folder and the files in the home dir within your installation taking note of the database credentials in your zp-config file, you will need it in step 4
   3. Download the latest version and upload it to your server.
   4. Once the files are uploaded, go to www.yoursite.org/gallery/. Setup.php will run. Follow the instructions.
   5. You’re done! Enjoy.