Ta - you got it in one - it was running in systray. Next time I'll read the small print. Thanks. I guess I expected a 'decent' uninstall to shut down the prog modules as necessary?
EDIT: Phew! 4 reg searches+reboots and there are STILL keys there, some which will not delete. Also found Hamachi and UltraVNC litter left around. Not over-impressed!