Yes John, that was how I understood it to be. To make it easier to manage I put my user styles in a folder which was nested in the Styles folder; that way I could easily keep them apart but still have them indexed in the stylepicker.

But my original query was that, having made a user style, do I nhave to visit the styles folder to delete it? I thought I might have been able to do this from the style picker, but perhaps too dangerous!