When I try to update to version 3.5.6 the file is downloaded, but when I click on it, I get a message that it contains a virus and was deleted.
I have AVG antivirus, and even when this software is disabled, the same thing occurred.
I added http://www.libreoffice.org/download/ to my trusted sites. Same thing.
I added libra office exe file to the inbound in the firewall. Same thing.
Same thing occurs trying to use Chrome, Safari, and Windows Internet Explorer.