Shirt appears in mp3 export

We use Audacity 2.0.3, in Windows 7, at least for this recording.

My wife recorded an original song in Audacity 2.0.3. When she listened to the song in VLC media player 2.1.5, a picture of a blue folded tee shirt appears on the screen. She has collaborated in the past with someone who has a picture of their face like that. She likes the idea of having a picture placeholder like that, but she would prefer to choose the picture holding that place. How do we change it from blue shirt to chosen image?

[u]MP3tag[/u] can change the embedded artwork.