Problem with saving textures within a project?

[jeffreyover9000]

My son used Algodoo to make a comic strip. He used pictures of some Nintendo characters as textures. Algodoo crashed and the autosave saved the project but not the textures. All the shapes were now blank colors instead of the characters.

Is there a way to avoid this in the future? Like, a way to save the project including the textures?