Global Drake CMS settings are stored in a custom PHP file called config.php under the private/ directory of your Drake CMS installation.
You should use the Global configuration admin backend component (please refer to the previous link for information regarding each configuration parameter) to edit your configuration, as a manual edit of config.php may lead to CMS malfunctions.
If you wish to carry out a reinstall and preserve your previous settings, you can rename the config.php file to config.template.php and the installation script will redirect you directly to stage 3 and allow re-installation using the previous settings. Most notably, the database will not be recreated.
Note: you should delete config.template.php once used since it contains the database password and other important private parameters.