Step 1: Login to the cPanel control panel.
Step 2: Click on ‘File Manager’ in under the Files section of the cPanel
Step 3: Locate the folder ‘Includes’ on the OsCommerce CMS installed directory and the view the file ‘application_top.php’
Step 4: Now look for “// define the project version” line on that file where you can find the version like below
+++
define(‘PROJECT_VERSION’, ‘osCommerce 2.2-MS2’);
+++
Step 5: Once you have upgraded the OsCommerce CMS version, the version will automatically update on that file too