Backup your MySQL database (use the database backup tool on the Zenphoto overview page for example).
Log into your existing site to be sure you know your Zenphoto user/password. Password recovery is not available during an upgrade!
Be sure to backup customized themes or plugins or any other customized file before replacing anything! (see above!).
Download the latest version and upload the following files. Since FTP clients tend to mess overwriting, best practice is to delete those first
and then upload the new files:
index.php
/themes (or actually just the six official themes within - backup if you have custom or customized themes within this folder!)
/zp-core
Make sure the .htaccessfile is writeable. (If you do not have a .htaccessfile, you will be given the opportunity to create on during setup).
Once the files are uploaded,navigate to www.yoursite.org/zenphoto/ (if you have installed Zenphoto within the folder zenphoto) and setup.php
will run. (If it somehow does not, please navigate directly to www.yoursite.org/zenphoto/zp-core/setup.php).
Info about the required permissions if you run into issues.