Two licensing systems are supported by Sarproz: USB-dongle based and encrypted-license+internet connection based. In the first case, you need to apply for a USB dongle (and the software works offline). In the second case, you need to run the software on a computer connected to internet. In particular in the second case, the License is machine-dependent (you cannot run Sarproz on a non-authorized computer). More details on the licensing system can be found here.