Per Pando:
The "W-logo-light-bg-150px.png" and "W-logo-light-bg-50px.png" images have been uploaded to the Aspen servers and you can see them as available by running the "Server Images - Aspen" report from District view, Tools > Reports > Details.
You would now replace the existing "/usr/fsc/resources/ma-walpole
(reference to copypaste file names)