mat files and textures - here the "proof". Just a little screenshot of the material editor. When the material turns black, mostly here is a pathname defined (see the circles) that Vue can't find anymore. Repoint Vue to the texture via load. Thats it! Regarding Guittas file. Does it not work to load it into Vue d'Esprit 4 first, save it again and then to load it in Pro? I will give it a try!

One day your ship comes in - but you're at the airport.