If you're interested in cutting edge Construct features try the Beta releases. These releases should not be used unless you are willing to tolerate some bugs.
More bug fixes
More bug fixes; new examples; documentation updates
Loads of bug fixes
New examples, and lots of bug fixes
Bug fixes for r123
Tween behavior; drawing canvas plugin; advanced random plugin; bug fixes
C3 runtime now default; new tile movement; audio fades; lots of fixes
New feature bonanza! Three new plugins & much more
Some more changes and a few SDK updates