pooleb ,
Sorry that you are seeing this issue with MyEclipse.
1) Can you share your Operating System and version details ?
2) The Visual Designers are only available in 32 bit installs. If you are on Windows 64 bit then you will need to install MyEclipse 32 bit to retain all features. The installer also provides that information when choosing between the 64 bit and 32 bit install (the text on the screen changes as the user hovers over each option).Take a look at the release notes for information about 64 bit Windows Support :
http://www.myeclipseide.com/module-htmlpages-display-pid-491.html
3) The Visual Designers are experimental in Linux systems. If you are on a Linux system then add “-Dlinux.experimental=true” to the end of your myeclipse.ini file and check. The Visual Designers may not work in all Linux environments.
4) The Visual Designers are available in Mac , but only in 32 bit Carbon install.