As of V2.1, a new upgrade script is provided for easy upgrading. Please follow the steps below to upgrade the old instance.

 * Download the latest version from the [wiki:download] page
 * Backup the old files and database
 * Extract the new files into the old instance directory
 * Login as administrator
 * If there is notification saying you need to run upgrade script to finish the upgrading, just click on the upgrade link and follow the instructions. The old instance will be upgraded.