Do I need to update my dsi before installing unlaunch?

Just bought a japanese dsi, and it's on version 1.4.1j. I already got twilight menu installed.

I see on the unlaunch install guide thaat it says "If the version is Ver 1.4.2, proceed with performing a system update"

Mine's on 1.4.1j, so do I need to update? If so, I only see 2 options on page 4 of the system settings.

Please let me know, thanks!