I have checked and I am able to download [Denodo Express](https://www.denodo.com/en/denodo-platform/denodo-express).
Remember that you must accept the License Agreement to proceed with the download. After accepting the agreement you will be redirected to the DENODO EXPRESS download page from where you can choose the installer according to the OS and the license.
Also on this page, you will find an overview of the installation process and links to the documentation for further help.
Hope this helps!