Sounds like a bug, not user error.
https://www.google.com/search?q=PhotoDirector7.&ie=utf-8&oe=utf-8#q=PhotoDirector+7.+nothing+shows+in+library+site:www.cyberlink.com&*
I do think that your NEXT STEP is to backup your stuff. After that, run CHKDSK /F on all drives then reboot and re-test. This has cleared up some really odd issues.
I am using PhotoDirector7. 3 days ago everything was fine. I could access all of my folders under :Library" and I made a "Slideshow" The slideshow is still there, but the library doesn't show any of my folders. When I try to re-import the folder it says that it is a duplicate. How do I retrieve the folders so they will appear in :Library?"

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