How do you get furniture back after selecting 'unfurnished' house?

"Anthonydyer;c-16332270" wrote:
I got it to work.

I went into another save, copied each room into my gallery, and placed them into my other save. Kind of a roundabout way, but I am glad I got the apartment back.

If you delete one wall piece per room, then stretch the remaining wall to fill the gap, thus separating the rooms again, then the whole floor space is regarded as one room, ie, you can save/upload an apartment as one room rather than separate ones. Doesn't work with balconies though.