Black Dialog Box

I have attempted to upload several sketchup models including the sample models from the Fluidray web site. I get nothing. Zero. Just a black dialog box. I’ve got little experience with rendering software, but with most other applications, when you import or open a file, something usually happens. I can see the numbers changing at the bottom of the dialog box, making it look like something is loading, but still nothing. Not even a little blip on the screen.