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The Desktop edition has a modern cross-platform UI; WPF keeps the classic, stable desktop interface. Start with Desktop for your first install. If you’re familiar with WPF menus, subscription groups, and tray controls, you can stick with the classic edition. Both downloads are v2rayN clients; don’t run them at the same time.
Both downloads are ZIP archives. When the download is complete, extract the archive to its own folder, then open the installer and follow the prompts. Don’t launch the app from the archive preview. Keep configuration backups outside the installation folder so they’re easier to restore when changing versions.
On first launch, add a subscription URL or import a share link, update the subscription, select a node, then configure the system proxy. The system proxy mainly affects apps that follow system proxy settings; it doesn’t route every app automatically. For other modes, read the guide’s notes on permissions and routing first.
Before switching between Desktop and WPF, save your subscription groups, custom routes, and local listening ports. Don’t assume every setting will transfer automatically.