Since the object cannot be found, there's no way for Archicad to create them in 3D. As a result, they don't show up in the 3D window at all, so you could not select them.
I do have the subsets but I chose not to use them but to replace all my objects with the same in the new version. Do not like carrying additional library for rest of my life. They are too heavy.
Thanks for the input.