Games run off the IOS files on your console, not the system menu. Sysmenu itself functions off IOS. You only need to update specific IOS files as newer games require newer revisions.
There's no point in updating to 4.2, it was only designed to kill homebrew. Once you're on it, it can be softmodded but requires additional steps. If you're having an issue running the new ocean game update the IOS listed on tealc's page.