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.

If there is any special instruction to upgrade to a version, it will be noted on this page.