The latest version is 5.11 or 5.32 depending on the dialer card you are using. There will be a version 6 coming out soon. Check out the web page at http://www.specterinstruments.com/ .
Hope this helps.
Bob
Robert J. Dusza, Jr. Treatment Manager (V) 1-860-647-3219 (F) 1-860-647-3150 E-mail - [email protected] Manchester Water & Sewer Dept. 125 Spring St. P.O. Box 191 Manchester, CT 06045-0191