Go to https://www.mixamo.com/store/#/search?page=1, make sure you're logged in.
open up chrome console by pressing F12 on your keyboard on the Mixamo webpage. Click on the "Console" tab in the new window (developer console).
Paste in "DownloadMixamoByLouisHong.js" into the console input and return. It'll starting downloading from that page and until the last page.
This is all really cool and just what I was looking for but I think some of us will have a new problem. These scrips and your awesome drop box file are the stock animations. I think a lot of us need the in place animations. Its a check box when you are looking at individual animations. I would love to avoid checking that box on 2200 animations. Anyone have a solution?