The following license is a requirement from Flickr.com that disallowed the Flickr Downloadr to download photos that are licensed with the default, "“all rights reserved". Make sure you change the default license if you want to download your own photos
or allow others to download them. Use this link to change the license:
Comply with any requirements or restrictions imposed on usage of the photos by their respective owners. Remember, Flickr doesn’t own the images — Flickr users do. Although the Flickr APIs can be used to provide you with access to Flickr user photos, neither
Flickr’s provision of the Flickr APIs to you nor your use of the Flickr APIs override the photo owners’ requirements and restrictions, which may include “all rights reserved” notices (attached to each photo by default when uploaded to Flickr), Creative Commons
licenses or other terms and conditions that may be agreed upon between you and the owners. In ALL cases, you are solely responsible for making use of Flickr photos in compliance with the photo owners’ requirements or restrictions. If you use Flickr photos
for a commercial purpose, the photos must be marked with a Creative Commons license that allows for such use, unless otherwise agreed upon between you and the owner. You can read more about this here: www.creativecommons.org or www.flickr.com/creativecommons.
To read more about this, visit: