V4.1.1 is the last patch for C4Pro that I know of.  You can get it by going to the DAZ3d website, choosing -->support-->downloads from the upper menu bar.  Then just select Carrara in the dropdown window and there ya go!  All the Carrara patches for C1 on up.  Doing a search here should turn up the Daz acquisition topic.  It was a pretty hot topic on many forums a few months back.  It might have also gotten mixed in with the Hexagon2 release discussions.  Things were happening so quickly and close together at the time.  Geez, ya know...  I can't recall now what the new big features were?  Must have been good ones though, since I bought the upgrade. ;-) 

Irene-