Have you tried searching for them with the windows search tool.
If not go to start - search, at the window that comes up high light search all files & folders (not music). Then wear it says all or part name enter .kma then wear it says look in enter the drives on your computer. if you did not have an external hard drive fitted when you imported your files just enter c: Then press search.
It should find the folder they are saved to. Then take a note of this then go to rebuild data base and direct it to this folder.
Hope this helps
