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.
Maintenance release with many bug fixes
Updated Dark theme, bug fixes
Supports using accounts offline
Patching a couple more issues in r42
Hotfix for issue in r42
Preview now runs on preview.construct.net
Built-in dark theme, Xbox Live updates, bug fixes
'Pick last created', safe mode, memory optimisation & more bug fixes
Re-land the architectural change originally made for r38
Themes support, usability improvements, architectural changes