This is after everything is placed and then later after editing the primary model, I realize that the module is a few inches or feet off, so I try to move it, but it won't let me. I've checked the layers, and they are all unlocked. This is a concern because I was reading in the manuals that modules could be a typical element or building construction that references another file that may be edited and updated. If this is true, then why can't I move it?