According to Blizzard, you can no longer download the classic client anymore, even if you’re a legal user. WC3 classic owners are now forced to download Reforged regardless. From the Shop tab, click Services and then Redeem a Code.From the Games tab, click the Redeem a Code button found under the logo of any game.
If you own a classic Reign of Chaos CD key, you must redeem your CD key on your account before you log in to the app. Warcraft III (Classic or Reforged) is installed through the Desktop App. There you will find the game key associated with Warcraft III, and a link to download the game client. To find your key, click Games & Subscriptions and scroll down to the Classic Games section.
