Download the Installer
Geocortex Web and Web Designer is installed with a single installation package, which is available on the Downloads page of the Geocortex Web Community.
To download the installer:
Open the Downloads page of the Geocortex Web Community, or contact your local reseller.
If prompted, log in with your ArcGIS Online account credentials.
Find the Geocortex Web section.
Click DOWNLOAD, and save the installer file to the desired folder.