Please notice that release 5485 is from 2012. Now, we have 2015 and 8017 (nightly) . Personally, I think it would be greate to have stable release in 2015.
If you want to try latest version you can download nightly builds from http://www.ultimatepp.org/www$uppweb$nightly$en-us.html, but if you really want to be up to date just use svn (I think I can write tutorial - how to use svn with Upp and Linux).