Visit the official Citra website and download the installer for your operating system.

If you need help with the or want to know how to transfer your save file from a real 3DS to your computer, let me know! I can also provide a list of the best graphics settings for lower-end PCs.

Before you search for download links, ensure your hardware can handle the 3DS graphics. Windows 7 (64-bit) or higher / macOS / Linux.