2nd Floor? – Home Design 3D - GOLD EDITION Review

I recently got the gold version because I wanted to save my projects and specifically so I could build more than two floors. When I was comparing the regular and gold version I noticed it said you could build unlimited floors on gold. I can’t figure out how and haven’t found any tutorials on it. Can you even build a second floor?
Review by Bored&Hungrey on Home Design 3D - GOLD EDITION.