The first thing you need to do, after installing and activating One Page Express, is to install the One Page Express Companion plugin.
Why do you need this? Because the One Page Express theme only contains the general design and a few options. This plugin adds lots of cool features like drag and drop editing and pre-designed content sections for your homepage.
To install the One Page Express Companion plugin, simply go to Appearance -> One Page Express Info in your WP admin and press the “Install” button for the One Page Express Companion.
Click on Activate plugin, and let’s start customizing!