Your scanned files should still be in that same folder. Or do you mean you scanned new ones and can't find them? When you scan them, you should see a dialog box about where to save them, that is where they will be.
There is usually a "Scanned" "Imported" "Scans" folder under Images or My Documents, maybe a few other placed, depending on the program used.
You can also do a search for recent saved documents or the names of the files to find where they are.