First, navigate to Megadimension Neptunia VIIR in your library, like so.


Next, look for the gear icon on the right, hover over "manage", and then click "Uninstall."


This window should come up with some text nobody cares about. Don't bother reading it, just click the big blue "Uninstall" button.


Finally, navigate to Megadimension Neptunia VII in your library, and click "Play."


There you have it, you've successfully fixed VIIR's Combat System!