If you use Ares to downld magnet links then it might be. But generally most p2p apps ask (& many don't) before they change to become your default magnet handler. If Ares doesn't ask to change it back & does it automatically then it shows a lot of arrogance on the part of Ares. Your choice. Don't know why you'd use 2 Gnutella clients. But do you actually use magnets with Ares.