The current version (4/2009) implements further improvements in presegre.
The 3/2008 version (3/2008) should be compatible with Macaulay 1.1 and future releases of Macaulay.
The 6/2007 version should be compatible with Macaulay 0.9.95.
The 1/2003 version incorporated a few changes in the routine `presegre' which should make it work a little faster, and ward off a potential problem in the choice of general hyperplanes.
The first (4/2002) version can be found here.
Please let me know of any known problem with any of the versions.