When I have first downloaded eclipse europe (3.3) , I opened the software updates window to install tools which I have used intensively. Eclipse VE was one of them. But I could not find anything. Then I searched a bit to what happened eclipse VE. According to their web page
Please note: 2007-10-03: Current official builds of the Visual Editor require Eclipse 3.2 (Callisto). The Visual Editor is migrating progressively to Eclipse 3.3 (Europa). Preliminary instructions on testing preview builds are available on theVE wiki. Thank you for your patience and supporting the project!