Don't know how I did it but the top level option for browsing my components is now my Desktop! The image shows each of the folders (or shortcuts to folders) on my current Desktop and one component which I am currently working on.

I have tried all sorts of searches both on the PC and on line to find a way of removing either the folders individually or the reference to the Desktop in its entirety but have so far failed. If I remove the folders/shortcuts from the Desktop and 'Refresh' I get a clean browser window again but as soon as I put any of them back on the Desktop, they reappear. The location for Components under System Preferences is set to a location on my G: drive, not the Desktop.
Would greatly appreciate an suggestions on how to fix this problem.