I'm trying to "infrequently" post a link to our "sister" forum for Envisioneer, but thought TFP users might appreciate the info in this link...
which explains what happens in the catalog when you make changes and want (or don't want) the change to affect your design....and how to know if your applied material is different than the catalog
http://www.cadsoft.com/customercare/viewtopic.php?t=4841
see the last several posts