Starting
From Commander4j Wiki
After Commander4j has been installed you will have 2 shortcuts installed, one to run the Setup4j program and one to load the main application Commander4j. The Setup4j program creates the database tables and should be used after initial install and upgrades, during normal use you will run only Commander4j.
When Commander4j is loading it will display a welcome screen as shown here.
You should now refer to the Logon page.