Usually, the Denodo Express License must be installed to ensure that the components are available for use.
The license can be installed while [installing the Denodo Express 7.0](https://community.denodo.com/docs/html/browse/7.0/platform/installation/using_the_graphical_installation_wizard/using_the_graphical_installation_wizard#step-2-selecting-the-installation-method) or it can be added using the Denodo Platform Control Center.
In case, I have not specified the license location during the installation of Denodo Express, I would perform the following steps:
* Open the Denodo Platform Control Center and navigate to the 'Configure' tab.
* I would check the option 'Use a license file' and browse to the location of my Denodo Express License.
* Then, I would restart all the servers and tools for the license changes to take effect.
You could take a look at [Denodo Express 7.0 Quick Start Guide](https://community.denodo.com/docs/html/browse/7.0/DenodoExpressQuickStartGuide) for more information.
Hope this helps!