Version history for PDFZilla shows you how often it was updated over the past months (starting Dec 29, 2008) as well as 'what is new' information for each update (if available, since this information provided by the author).
v 3.2 updated on Mar 15, 2016
Added the new engine
v 3.0.4 updated on Dec 01, 2014
fixed the registration bug.
v 1.2.9 updated on Apr 07, 2010
TIF Exporting bug fixed.
v 1.2.7 updated on Nov 11, 2009
Windows 7 now supported
v 1.1.0 updated on Mar 30, 2009
Word Conversion Bug Fixed.
v 1.0.1 updated on Dec 29, 2008
Go back to the PDFZilla review