NexusDB is delivered as a source only installation to keep the download size for our customers as small as possible.

Uninstall any previously installed NexusDB packages (for all Delphi Versions) on your machine        
Ensure that you have closed down any running instances of Delphi. (The installer detects this in order to be able to properly install the components into your IDE)
Execute the setup executable you downloaded
The install wizard will then lead you through the installation in the usual fashion        

This should now have successfully installed NexusDB into your version of Delphi and be ready for use in your projects.

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