I have a broadband set up with Virgin router (but set up as a modem) -> Deco M4 -> Hive Hub (online heating thermostat) At present the Hive Hub wont connect to the Internet, and I cant find the fault,

How do I get to see a list of all my Deco networks? Which menu do I select? How do I navigate to it (within the app)? I want to delete the old unwanted networks Thanks!