LispWorks Professional and Enterprise Editions are supplied as an installer containing version 6.1. There may be a downloadable patch bundle which upgrades LispWorks to version 6.1.x. You need to complete the main installation before adding patches. The installer for 32-bit LispWorks contains both Professional and Enterprise Editions.
LispWorks Personal Edition is supplied as an installer containing version 6.1.
LispWorks Release Notes and Installation Guide - 23 Dec 2011