I have received number of file sharing requests recently and there is a reason for this. This site, as you may have noticed, uses Google Drive for file sharing. Now, Google has updated their security policy with the Drive link-sharing (You can "google" more for this easily). I didn't really pay too much attention to this, so the file links do this now. My links are shared-with-anyone, but still affected. So, I'll probably have to go through all the links and update them. I'll update here when it is done.