I got all the latest versions, including asterisk-gui-0.9.7-3-1 #355. Gone to the r Path GUI I then tried a System Update and then it tries to "update" my asterisk-gui back to 0.9.7-1-1 #331. Alex I am also have an update problem in that since the last update the system now fails when it tries to do an update.From the GUI version 1.0.9 version 290 I get "Looking for available updates ...
The flexibility of the new engine affords a lot of power for folks who are building systems on top of Asterisk.
However, it is not a Long Term Support release - and as such, unless you feel comfortable looking through the changes in Asterisk 12 and working through the configuration differences and the new features, you may be well served by waiting for the Free PBX system to provide a more suitable upgrade path.