Ok, I tried something COMPLETELY different. I was going to back up the family table generic assembly to a network drive, then rename the assembly on the network, open the assembly, delete the entire table, then save it, thus saving it to the Workspace without the instances.
I found a much better and easier way, again, going outside the POS system: Simply do a "Save a Copy" in Pro/E in the generic model. You now get this popup window that allows you to select any models you want to reuse or copy, I just reused everything. When it copies the file, it does not copy the instances, so there is no family table to delete. you save it and then it's a new file in the workspace. Done.
And so, the best way to work in Windburn is to.......avoid using it when possible. 