Desktop and WPF differ mainly in their UI framework and layout, not subscription quality or server capabilities. Choose the interface that suits how you work; there’s no need to run both editions at once. If both client processes use the same local listening port, one may fail to bind. The window may open even though the proxy hasn’t started.
For a first-time install, use a dedicated working folder. Don’t move just the executable and leave the other bundled files behind, or mix the installation folder with a temporary extraction folder. After installation, open settings and check the local listening address, port, and current proxy mode before importing an existing subscription.
When migrating from an older version, use the client’s export or backup feature to save your configuration before installing the new interface edition. Don’t assume that different interfaces or releases use identical configuration folders. After launch, check that your subscription groups, custom routing, and DNS settings migrated correctly. For step-by-step instructions, see the v2rayN initial setup guide.