Yeah,
Its in the way you are calling your dropbox links;
replace all www.dropbox.com references with dl.dropboxusercontent.com. The former is a sharing link to the download page and not to the raw file itself;
For instance;
https://dl.dropboxusercontent.com/s/dri77wfcftmkyu4/map-interact.js is the correct reference to map interact.js
See more info here;