A computer system for providing software over a network includes: a computer system for providing software over a network is provided. The system includes: a control unit configured to reside at a site, the control unit including a control unit identification (ID) that uniquely identifies the control unit to the network; a copy of the software, the software including sets of features; a license generator configured to create a features activation file containing the control unit ID and identifying at least one set of features to be activated by the control unit; a computer configured to download the features activation file to the control unit; and, the control unit configured for activating one of the sets of features according to the features activation file. A method and a computer program product are disclosed.