Expanding the appropriate file download and running Setup.bat will uninstall any old NORMA version and reinstall the new NORMA components. Visual Studio instances should be shutdown before running setup, and Vista/Windows 7 users should either launch the provided SetupVista.bat or explicitly run Setup.bat as an Administrator. The release includes modifications through changeset 1473.
The June 2011 NORMA release adds new display features (display objectified fact types as object types, display and attach constraints to link fact types), additional ring types with an improved editor for choosing ring types, visible zoom commands, and a long list of bug fixes.
Details are available in the included Documentation\Readme.htm installed with NORMA and in the SVN change logs on sourceforge. A copy of the readme has also been posted on sourceforge so you can review changes before you download the binaries.