Run it because it will update to the new client. It has to redownload everything but at least you dont have to wait on ANet dragging their feet. A good head start for peeps with slow internets. http://www.reddit.com/r/Guildwars2/c...s_working_atm/ where i found out that the client will update. Here is proof that im not bullshitting you guys http://i.imgur.com/hjWU7.jpg and im not breaking NDA (read the patcher)
EDIT: the link to the exe which will redownload the who thing if you need it http://cloudfront.guildwars2.com/pVR...hwCn1J/Gw2.zip
EDIT2: somebody beat me to the punch disregard this thread i guess