When you first launch Ryujinx (without any command-line flags), it creates a default Ryujinx folder in your user profile:
Moving between PCs, keeping multiple separate configurations, or avoiding system user folders. ryujinx folder new
At first glance, it seems cryptic. Is it a hidden feature? A beta branch? A command-line argument? The reality is both simpler and more useful: “ryujinx folder new” refers to how the emulator handles fresh installations, portable setups, and the creation of new emulation environments. When you first launch Ryujinx (without any command-line