The latest version available is SMPlayer 14.3.0, which has been recently released. Among others, it comes with a rewritten full screen support, the audio equalizer has received some new presents, it got support for playing blu-ray discs, it got improved support for multimedia keys, the playlists now update by themselves when new files are added to the folder and a Youtube browser features has been added. For more information, see the release notes.
In this article I will show you how to install SMPlayer 14.3.0 on Ubuntu 14.04 Trusty Tahr, Ubuntu 13.10 Saucy Salamander, Ubuntu 12.10 Quantal Quetzal, Ubuntu 12.04 Precise Pangolin, Linux Mint 17 Qiana, Linux Mint 16 Petra, Linux Mint 14 Nadia, Linux Mint 13 Maya, Elementary OS 0.2 Luna and their derivative systems.
Because it is available via PPA, installing SMPlayer 14.3.0 on the listed Ubuntu, Linux Mint and Elementary OS systems is easy. All you have to do is add the ppa to your system, update the local repository index and install the smplayer and smtube packages. Like this:
$ sudo add-apt-repository ppa:rvm/smplayer
$ sudo apt-get update
$ sudo apt-get install smplayer smtube
Optional: To remove the recently added PPA, uninstall smplayer and smtube and downgrade all the packages that got upgraded, do:
$ sudo apt-get install ppa-purge
$ sudo ppa-purge ppa:rvm/smplayer