In your settings page you can set your password, set that and then use your email and that password to login.
It's under "My Library" -> "Wallet & Settings" -> "General"
Client version 1.5.60, for some reason the client doesn't show various bundles that I've bought, even if they're DRM free-downloads from webpage.
Also would appreciate filtering criteria of "Purchased game" in library, so I can better find the items I've actually decided to purchase, without...