Thank you James. I thought I might need to contact the host but I hoped someome more experienced might have a different answer.
I have already looked in the add-ons and each one is different thus I assumed I need to update each separately (10 in all).
Am I also correct to think I also need to update the main WordPress installation of which the add-ons are a part? I think I will have to but maybe you know differently.
Thank you for your help. Much appreciated. Jim.