They just had to add the .RTW to it. I'm not an MS basher but this seems like a silly little mind game.
(Release/Released To Web) A version of software that is ready to be sent, or has been sent, to a Web server for downloading by the public.
(Release/Released To Manufacturing) A version of software that is ready to send, or has been sent, to the CD/DVD manufacturer to press discs.
Why not just be clear and add Final?