SW category contains Dektec SW mostly dedicated for use in association with Dektec devices. In this case SW license is associated to adapter's Serial Number. You can check what licenses your adapters have by free DtInfo utility.
There are few SW modules, e.g. TS Analyzer Stream Xpert, which can work without Dektec HW devices, where license is provided at USB dongle (abbreviation DGL behind product model).
To install a Dektec licnse (.dtlic files), you can follow these Dektec guidelines.
ATSC-3 reception and analysis software Real-time ATSC 3.0 receiver and analyzer with advanced RF measurements and decoding of the ATSC 3.0 signaling information. Allows recording of PLP data to file and output over IP.