lost terrestrial tuner

I would be most grateful for any help please. I have a GiGaBlue UHD UE 4K with two tuners A and B, and a plug in twin tuner for terrestrial channels. I had it set up so that tuner configuration on the menu showed Tuners A to I, with tuner I being the terrestrial tuner. I decided today to do a software update and after it rebooted I cannot see Tuner I any more, just A to H . So now I've lost all my saorview Irish stations on terrestrial . I've no idea what to do, or what I did when setting it up originally, and would be grateful if anyone could help .