I downloaded a 3dm file from a furniture company. I was able to import the file and insert it in my Archicad model. The problem is that the block contains all size/config combinations of the sectional sofas they offer. I want to "ungroup" the block, delete the sofas that I will not need and only keep the sofa configuration I would like keep in my model.
The "Ungroup" option is grayed out. And I am not sure how I can "edit" the imported item.