i believe the following will work (because i've done something similar in the past).

agree the licence; bookmark the URL for the resulting download page;
continue to download all you need from saved URL,
using something that supports HTTP/1.1 byte-ranges,
whether automated or not,
until done.

if the download URL didn't have a reasonable lifetime it would be an obstruction,
but as it is, it should last for a good few days.