Use your computer's search to look for some of the files that you were sharing... once you find them, make a note of where they're saved. Then in LW go tools > options > sharing. You can add the folder containing your files, if you want to share again. Click Apply > ok to save the change.

Or have a look at this link, which has info about the default saved & shared folders for different versions... that might give you a place to start to find your files
If you've updated LW and can't find your downloads!