Toward the end of this month, the 10gb bandwidth limit on free on the http://www.box.com account was exceeded, so none of the downloads worked. For now I have moved them to a new dropbox.com account which has larger bandwidth allowances. In the future I will also be splitting the rigs into separate zip files(instead of all ages) to reduce amount of unwanted files downloaded. The links on the download page have already been updated.
You do not need to re-download if you already have the rigs/plugins. They have not been changed in any way, just relocated.