@Bill_W,

I am not positive on the steps to do so in the Tether App, but I will look into it further;

We do have a guide on how to export and use a backup file from the Web Interface of Your Router - Which you may try here.

If you simply need to save the settings you have altered, options should be provided, such as Done or Save - If not, the app should prompt you to save or discard changes when navigating 'back' in the menus without saving.

If you are saving your changes but not seeing any changes take effect, please restart your Deco Nodes so they will use the new settings