We have a version 4.0a licence installed on our network (with CFD, ACDC and Chemical Reaction Engineering modules). It is used a bit by someone in one of the other research groups I think. It seems to run up OK on my machine. I tried to have a go with it a while ago (just going through the basic tutorials) but never got very far, but if you send me a basic model to get me started I can have a go.