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To start JobScheduler use the shell script ./bin/jobscheduler.sh (Unix) or ./bin/jobscheduler.cmd (Windows). The binary files are parametrized by the start script. One of the parameters (-sos.ini=...) in the start script addresses the license file ./config/sos.ini, that contains an Open Source License key for the GPL version of JobScheduler.
There is no difference between GPL and commercially licensed versions - this is a technical license key that helps us to identify commercial customers Commercial License holders in case of support incidents. Different license models can apply to use of the JobScheduler Universal Agent.