We currently use AutoCAD, and want to switch over to Pro/E, and Pro/Intralink. Two of our users have experience using Pro/E WF1, and Pro/Intralink 3.4, and we would like to go with that.However, I do notice that PTC is really pushing WF3, and Intalink 8.0. When we purchase two new seats of the software, can we get WF1, and 3.4, or will we be forced to use the newest version?