Rebuilding A Lot Sulani - help with finding lot objects.

I've just been reading up on it. Sounds like a lot of people have experienced what I am, and an option is to go into build/buy mode and leave the search box empty and it refreshes the objects. Seems to work for some but not everyone. That must have been how mine all appeared today, but now they've all gone again. I've tried what was suggested and still nothing.
Thankfully I build my lot so all's good, but frustrating to know I can't easily get all the debug environment objects when I want to refurbish.