queXF 1.11.2 has been released today on Sourceforge
This release fixes the testconfig script, makes it the default administrative page and adds tests for directory based security. Also, a bug where barcode fields were not being output to CSV has been fixed.
Read more for details on how to upgrade
1. Backup config.inc.php (copy to config.inc.php.bak)
2. Extract the new package over your existing installation of queXF 1.11.1
3. Copy your config.inc.php.bak file over the extracted config file.