Explorer Shell Extension in v2.04.297

I hope I haven't lost the plot here but my understanding of the new features is that we now have a shell extension in Windows Explorer. Under Windows XP SP3, I am unable to get Defraggler to appear in any right click menu, for example right clicking on the root of drive c: doesn't produce a Defraggler entry for me.

I have tried un-installing and re-installing etc. Has anyone had a similar experience?

Regards

Does Defraggler appear in the context menu when right clicking the folders and files within the partition?

It does in Vista. But to defrag the partition I must open Defraggler.