As long as the scene was saved from the same major version of Ds (3, 4 etc.) you can rebuild a broken data folder by loading the original Poser versions of the stuff (models and morphs, textures don't matter) into a new scene and saving that to a temporary folder (that is, don't save it over an existing file - the scene file itself isn't needed and can be deleted after saving, it just forces DS to rebuild the native geometry files for that content).