To update your website to the latest version of Virtuemart 2.9.x for Joomla 3 you have two options.

IMPORTANT NOTE

ALWAYS BACKUP YOUR WEBSITE BEFORE COMPLETING AN UPDATE

Option 1: Automatic Updates

1. Log into the Joomla administrator area of your website
2. On the left hand side of the Joomla administrator area of your website you will see a "Maintenance" option
3. If updates are available for Virtuemart the "updates are available" option will display the number of updates which you can install
4. Once you have selected the "updates are available" option you will see the latest version of Virtuemart available to automatically install at your website

Option 2: Manual Installation

1. Visit http://dev.virtuemart.net/projects/virtuemart/files
2. Download the latest version release of Virtuemart 2.9.x from the website
3. After you have downloaded the latest version unzip the zip file first onto your computer before installing the extension
4. Make a FULL BACKUP OF YOUR JOOMLA WEBSITE INCLUDING FILES AND DATABASE
5. log into the Joomla administrator area of your website
6. Select the Extensions menu and select the browse button and upload & install button to upload the com_virtuemart zip file and com_virtuemart AIO zip file
7. The install process will overwrite your current installation of Virtuemart. You do not need to uninstall the extension first.