Once you have received access to your Scout Knot Hub you can update the logo and icon easily.
Instructions
Click on the arrow next to your name in the top left corner.
Select ‘Hub Administration’>'Look and Feel'
Click on the image under ‘Logo’ and select ‘Change Image’ (Do the same action to update your icon)
Select ‘Ok’
Select the ‘Save’ button at the top right of the screen.
You’re all done!