Empty folders in Media Center Picture Library - How to delete?

I'm running Windows Home Premium with Media Center. How do I delete the
thousands of empty file folders in "no tag" section of Picture Library? I was
told by Dave in Communities:

"Media Center stores thumbnail images in
C:\Users\youraccount\AppData\Local\Microsoft\ehome\Image.db

Close Media Center, rename Image.db to Image.db.old and MC will rebuild it
the next time you start. Note: ..\AppData is a hidden folder, so you will
have to unhide it first.

I did all this, but was not able to find Image.db in “ehome�. All I found
was “ArtCache� and “UrToCoverArt� Please help. Been on this for weeks. Thanks