Upgrading to XMB 1.9.11 Upgrading is a one-way process. To backout you will need to restore your files and database from a backup.

Backup Your Forum
Please backup both your forums database and files before continuing. This may seem like common sense but is often forgotten. If the upgrade process fails and you do not have a backup, XMB will be unable to help you. All data could be lost: posts, users, etc. You have been warned!

Modifications Notice
This upgrader is designed to work with modifications installed. However, all modification data, templates and code, will be destroyed during the upgrade process. Please proceed with extreme caution if you wish to keep your modification data intact.

Known Issues
These are known issues with the upgrader. However, they will only affect a small percentage of XMB Forum users. Normal Upgrade Instructions for Versions 1.9.5 through 1.9.10
  1. Backup the database and all files. Remember to keep the config.php settings handy.
  2. Disable XMB using the Board Status setting of the Administration Panel.
  3. Upload all 1.9.11 files over the top of your existing files.
  4. Delete the /install/ directory and all files in it.
  5. Edit the new config.php file with your details. It may be helpful to reference your old config.php.
  6. Upload the /upgrade/ directory to your forum directory.
  7. Run: http://www.yourdomain.com/path/upgrade/upgrade.php
  8. Upon completion, verify that the /upgrade/ directory has been removed.
  9. Enable XMB using the Board Status setting of the Administration Panel.
Alternative Upgrade Paths Enjoy XMB 1.9.11!