Cool so just to be clear on what the link says, even if I downloaded it before, I need the launcher again to update the new file into it?
If you already have the .rpa, just download the launcher, run it and follow the onscreen instructions.
For future updates, you drop the latest .rpa into the same folder, delete the old .rpa and launch the game.
Makes no sense why i got downvoted for asking about clarification, when the guide says nothing about deleting the old .rpa, which is an important part of updating the game.