Here is a timeline of Legacy Unison Light Manager software releases:
V1.55 – July 1999
V1.65 – June 2000
V1.8 – March 2001
V1.8.02 – Feb. 2002
V1.8.04 – Oct. 2002
V1.9 – July 2003
V1.9.1 – Dec. 2004
V1.9.2 – May 2005