Stable releases have been tested and used in our Beta channel which helps eliminate the chance you'll run into bugs. If you're not sure which releases to use, you should probably use Stable releases.
Stable release: mesh distortion; scene graph editor; local file/folder saves & more
Stable release: scene graph feature; copy/paste in Project Bar & more
Patch release for r210
Stable release: mobile improvements; wake lock; updated templates & much more!
Patch release for r204
Stable release: nested timelines, Date object, cloud save improvements & more!
Patch release for r197
Stable update: guided tours, overhauled Pin behavior and lots more!
Patch release for r189
Stable update