Éncontré la respuesta en la web del fabricante:
Cita: The Community Edition is an entry level obfuscator included in the Professional and Enterprise SKUs of Visual Studio.NET 2003 and the Standard and Professional SKUs of Visual Studio 2005 and the Architect, Developer, Test, and Suite SKUs of Visual Studio Team System. In order to run, the Community Edition requires that Visual Studio also be running. It is targeted at students and freeware authors.
Yo tengo la Standard, por eso no lo encontraba....
¿alguien conoce un ofuscador gratuito o de bajo coste?
saludos