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The main differences are the interface technology and layout—not whether you need to import a subscription. If you’re happy with your current setup, keep using the interface you know. Before switching, export or note your subscription groups, routing rules, and local ports, then check each setting in the new interface.
Once the download finishes, extract the ZIP to a local folder before running the installer. Don’t launch it from your archive utility’s temporary preview folder. Start the client without elevated permissions; only grant system-level access if prompted for a feature that requires it.