I do not mean if it is working - but from safety reasons - Program Files folder is protected. Other normal folders are not - so if some malware would enter your system (no antivirus is 100%) then it would have easy access there. And I doubt that if gw2 ask you for admin privileges (as it is done during install or other operations) - many of users will allow it not knowing that it might be altered by malware... Program Files folder is there not for fun 🙂