Hello,
I've just update to version 4.2.0, and somehow the status bar is missing.
The Lua Commander is there, but the console-like text box which displays messages from sim.addStatusbarMessage or sim.addLog is not there.
it seems you must be on Windows. Please make a clean install: make sure that the folder <program files>/CoppeliaRobotics/CoppeliaSimEdu/ is empty or non-existent before installing. The folder should normally be automatically removed by the system, but in some situations, it is not somehow.
Similar if you install CoppeliaSim Pro or CoppeliaSim Player on Windows.