Older version are available for download, tooOlder versions are available, but not 100%. Why? Because newest version of a certain software has a reason why it was published to the public via app market, or blogs like this.
So the question is, should you use the newer or the older one on your phone? Depends, if you already have installed Sygic on not anymore a new phone, maybe you shouldn't update so fast without even looking around, but still when they make this new version they don't publish it unless it works on every single phone.