Can you run the 'StudioLibraryContents.bat' file attached. It should create 2 files, StudioLibraryFolderContents-Vista-7-8-10.txt and StudioLibraryFolderContents-XP.txt.
Can you attach both of them to this post please.
What Operating System are you using, and what version of Silhouette Studio are you using?
Make sure in Silhouette Studio there are some library entries.
Ian