After activating Maltego Graph (Desktop) for the first time, the Configure Maltego startup wizard will prompt you to install Transforms from selected Data Sources in the Data Hub.
By default, Maltego's public data sources will be used. If your company has purchased a private server then you may enter the hostname or IP address of that server.
Selecting a data source from the list will install Transforms, Entities, Machines and other Transform configurations from the corresponding Maltego Public Data Source.
After clicking Next, these items and configurations will be installed.
Once the installation is complete, a summary will be displayed, similar to the one below, listing the items and configurations installed with Maltego Graph.