Hey Anime!
When placing the new .rpa into the "game" folder, make sure to delete the old .rpa if you haven't done so already.
If you have, the new download might be corrupted or incomplete. I'd recommend either trying redownloading, or grabbing from our Patreon, as we offer a few mirror sites to download from.
Requires a Patreon account (free to create if you don't have one already) and you can grab the latest free version (0.8.11) here:
Hope this helps!