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.
Last round of bug fixes (hopefully)
New Platform Info conditions; bug fixes
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