Thanks for the response, much appreciated.
But I think there is a bug in the programme. The following is why I say so.
I place some furniture on a basement story and it works fine. I then try others and instead of it being placed in the basement, it appears on the ground floor.
The same thing happens with stairs. I have a set of stairs on basement and ground floor, however I only want on 2 sets of stairs on basement level
Also, when I then move to the ground floor and want to start my ground floor, I can only see part of the basement in the 2D view.
When I was trialling the software I couldn't add a basement, but I worked with ground level and first floor. No issues arose.
Do I need to reload the software and use my Registration code on the new download. Could that be an option