Cinematico allows you to edit the administrative user for your website directly through the administrative area. You can do so editing the configuration file as well, but it will be much easier using the user interface.
To edit the administrative user for your website, simply access the URL of your Cinematico installation, followed by /settings. Scroll down to the Your Account section and edit the following details:
Click on the Save at the bottom-right corner of the screen to keep the changes.