I spent about six hours composing this picture yesterday.  Did a test render at about 1AM and the render was great, just needed a couple of tweeks, so I saved it using the default and it saved as a .duf in my files.  I opened it about two hours ago and this is what I had.  The error message said it couldn't find some of the file links, but they were there when I saved the image, closed the program, and turned off the computer.

This isn't the first time this has happened, but I can't figure out how to fix it.

Anyone have any suggestions?

I have seen this happen with older props.
The geometry and UV's are probably in "data/4_0_2" but the .duf is referencing "data/".

Before making scene file, convert prop to current format (duf).

You can do this from file menu.
File-->Save As-->Support Asset-->Figure/Prop Assets
and dialog box will appear.  You can save new prop to same folder or some other.

Looks to me like you have the wrong preview mode selected. From the flydown menu indicated as A in the image try selecting option 2 instead of option 1.