I've just come back to add the Green Tick to lotvic's advice and add a little more information.
The reset programme "Adjprog.exe", from lotvic's link, is the same or very similar to the Mark Kneen version, but the printer database is better/more recent. It had my printer on its list. Also the "Ativador.exe" programme provided in Lotvic's link allows access to more feature to reset in the printer, one of which covered the ink pad counter reset.
Thanks again to lotvic, Sapins & Burn-It for your input.
Peter (Not ~24).