There is a sitech yahoo group also. Very helpful group of people.
https://groups.yahoo.com/neo/groups/SiTechservo/info
32bit apps can run on 64bit. Sitech is a little fiddly to install there are few prerequisite but once going it’s very good.
Also look at this site
http://www.sitechservo.info/
https://sites.google.com/a/sitechser...k-shaw-s-site/