How to update xibo server

Hi,

I want to update my xibo server with the help I found on the website:

Backup settings.php from your installation
The upgrader will offer to take a backup your database, but manually taking a backup would be a good idea.
Replace your existing installation with the new version from the tar.gz or zip file
Replace your settings.php file
Browse to http://your.server/path as normal
You will be prompted that an upgrade is required.
Enter your xibo_admin password, and follow the upgrade wizard.
The upgrade should run, and finally ask you to log in as you would normally.

So I backup my settings.php, replace the map with the new files. But what I need todo with the settings.php file than?
In the help there stands "Replace your settings.php file " but in the upgrade there is no settings.php file. So what I need todo?

Thanks