GeoSWMM has been developed as an add-in for ArcGIS® 10.x. Desktop system requirements for ArcGIS® 10.x are available on the ArcGIS® resources web-link at:
A user must have ArcGIS® 10.x installed on the computer prior to the installation. GeoSWMM is available for download from the Streams Tech's product page on:
Detailed instructions on software download, installation, activation and upgrade are available for registered users on their My Products page.