Hi Jerome,
The setting “Cluster” was taken out a while ago. Its function was to take all child-objects under a “Cloner Object” and handle it as one object. You could do this today with a simple Null object as Parent on top of them (Some people suggest a short cut to Group Objects, I avoid it, as it takes the average position of all objects and places the Null there. Not a good idea in most cases. On the other hand, any object that was animated before, might destroy the animation information as it was based on a different origin point (e.g., World) for example. So a fresh Null manually created and attached is the better way. If you get used to the short cut, it will bite you soon or later. A reason why I have given up on it a long time ago. It just pays off.
Another way is to use the Fracture Object as Parent object, as it might leave more options later on. It creates internally one copy of everything, there is the disadvantage to the Null parent (If recourses are limited).
BTW, if you have R16, you might take a lot of information in that have no need anymore for that. Which is perhaps true for anything MoDynamic before R12. have a look to the comparison of the “Shape” options. To work-a-round ;o) the old limitations is interesting, but not needed anymore.
All the best
Sassi
Image: Dark GUI = R16, Light GUI = R11.5