SuperCollider 3.4.5 is now out. This is a bugfix release, fixing a handful of small issues in 3.4.4.

Source code only at first:
https://sourceforge.net/projects/supercollider/files/Source/3.4.5/

Someone might upload pre-compiled packages later.

Our current efforts are focused on the forthcoming 3.5 major release. (Don’t get confused between 3.4.5 and 3.5!)

If you’re interested in the cutting-edge, here’s the announcement of the first beta release of 3.5: http://comments.gmane.org/gmane.comp.audio.supercollider.user/81931