All of your style demos should already be on the hard drive under the following:
C:\bb\RealTracks\Data\Style Demos Audio
Those will be the ones that end with WMA
I think that BIAB will play the online audio as default. You will have to use your file explorer to find the local audio equivalent and open it up to play locally.
I checked and found that it was already in the local area, but it was still playing on the Internet. Because I linked to foreign websites very slowly, I couldn't hear it quickly, but in fact it was already in the local area