My model does not look as smooth as it did in my other 3D package.
Most 3D packages apply a visual smoothing that makes a 3D model appear to be smoother than it really is.
Aspire will only show a 3D model as it really is, with no smoothing applied. This is to ensure that the on screen representation correctly resembles the final cut piece.
Once your 3D model is in Aspire, you can use the Smooth Components tool to take some of the edges off your model, but it is more effective to increase the polygon count within your 3D package and reimport it.