Nintendo actively bans consoles that run unauthorized NSPs. Downloading Abathor from a non-eShop source risks a hardware ban, loss of cloud saves, and legal repercussions. Always support the developers.
If your Switch is connected to the internet and you own Abathor: abathor switch nsp update eshop
As of mid-2025, the critical update for Abathor is version 1.1.0 (some regions show 1.0.2 depending on publishing delays). Here is what the official update does: Nintendo actively bans consoles that run unauthorized NSPs