FS9 uninstall problem

I have been trying to uninstall FS9 but because of a part associated I cant get past Cannot Delete: STT_ClockNav_V!_O.gau. Access is denied.
I realise that his is associated with an aircraft I have downloaded (it was a russion TU - 154P I think) but after dismantling FS9 bit by bit I cant get past this message. For some reason I cant get to the uninstall option on Disc 1 either.
I would appreciate any advice.