Short-term solution suggested to me by someone else - I'm swapping from the direct download currently being used to an external download (aka going from "click 1 button to download" to "click 1 button, wait for MEGA to load, click another button to download"). If you're concerned about it being some sort of shady site (or a site that bombards you with a hellscape of ads), don't be - it's just another link to MEGA (specifically to just the costume .swf).
In the long run once this is all sorted out it'll be moved back to being hosted on the Resource Manager, though.