Yes, the WPILib menu in Eclipse seems to be broken on most, but not all, of the computers we’ve set up.
The whole process of setting up Eclipse and installing the FRC tools seems overly complex and error-prone. Particularly the part about the FRC toolchain source (FRC Windows Toolchain 4.9.1-0build1.msi) needing to be run from the same drive that Eclipse is installed on.