The upgrade process for osCommerce will vary depending on what version you are upgrading to and may not be an easy process for the average user.

At the time of this writing, there are two versions of osCommerce available, each with different server requirements:

osCommerce Online Merchant v2.3.1
Server Requirements:
    PHP v4+ (PHP v5+ recommended)
    MySQL v3+ (MySQL v5+ recommended)

osCommerce Online Merchant v3.0.2
Server Requirements:
    PHP v5.3+ (with PDO MySQL extension)
    MySQL v4.1.13+ or v5.0.7+
(v3.0.2 is still considered in "development stage")

Currently, osCommerce v2.3.1 is compatible with our servers. If you are using an older version of osCommerce and want to upgrade to v2.3.1, we can provide some basic guidelines for the upgrade process and assist you in locating the instructions for upgrading.

For the full instructions for performing an upgrade:

1. Download the osCommerce installation package to your local computer
2. Unzip the file on your local computer
3. Review the upgrade_guide.pdf file.

Before beginning the upgrade process, first make either a full backup of your account or a partial backup that includes your site files and your database.

Following are links to information on performing various tasks often needed during software upgrades:

• How to create a MySQL Database
• Creating partial backups of your hosting account (you can use this option to make a backup of your home directory and a separate backup of your database)
• Importing to a MySQL Database in phpMyAdmin
• Using the File Manager in cPanel
• Getting Started Guide : FTP
• How do I change my File Permissions?

If you need further assistance in upgrading your osCommerce installation, we recommend the osCommerce forums. The osCommerce forums is a community of osCommerce who are very helpful with questions or issues that may arise during the upgrade process.