Version 2.4 has just been released.  The primary change is addition of a link to a new Facebook public user-to-user forum group ( https://www.facebook.com/groups/1455566968077344/ ).

Users can access this Facebook link directly from within SigmaPipe (top, right toolstrip button or under Main Menu - Admin).  This forum is intended for user-to-user questions and comments.  SigmaPipe.sig run files can also be uploaded for others to examine (a test case has been uploaded).