The problem is probably not with your OS (which one?) or Sweet Home 3D. The most likely is a corrupted furniture file.
Try extracting the zip and import the extracted model. I believe on IOS that is the required method by default.
The zip should have one or more 3D model files of the type .OBJ(+.MTL and possible textures images), .3DS, .DAE, or .KMZ.

If that still doesn't work: Do you have the same problem with importing other models?