Yeah actually you can get the cores individually from here:Here's the thing, we'd like to avoid using the online updater as he would like to try being able to go online by keeping his system clean.
Any suggestions for how to manually add cores?
Thanks for the quick response.
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I've actually done exactly the same thing, settings, driver, menu driver, but even when I save it, it doesn't work, it always rolls back to rgui.
We're using the NSP version, is that causing some problems?
http://buildbot.libretro.com/nightly/nintendo/switch/libnx/
Get the latest .7z from there, and then extract the cores folder in your SD card inside /retroarch/
As for your second problem with the menu, probably means you are missing the "assets" folder too.
You can get it from the same link I posted, simply try searching for it in the drop-down menu on the left.