Adobe Flash Professional CC (called Adobe Animate CC as of February 2016) is the first 64-bit version of Flash and according to Adobe it had to be re-written from scratch. This, again according to Adobe, required some features to be dropped - the useless stuff that they were introducing and selling for millions over the last 5-6 years as innovative bones, symbol sprays (Deco tool), TLF text and the amazing (!) motion editor are gone. They are selling the removal of these features now - lightness and speed. What a relief!
The list of dropped features is endless and is well worth looking at. They have also shuffled their folder structure around and changed the Extensions Manager file format which pushed us to make drastic changes to our method of installation.
Flash / Animate CC have at least one critical bug which required a workaround for the Smart Magnet Rigs to function.
As explained in the article on Smart Magnet Rigging, Symbol instances are being assigned metadata IDs via the SMR Panel. These IDs enable the use of Smart Transform, Smart Magnet Joint, KineFlex and so on.
In Flash / Animate CC when you use the default Convert to Keyframe or Insert Keyframe [ F6 ] functionality the metadata is wiped out.
To be able to use Smart Magnet Rigs in Flash CC / Animate CC you need to switch to Convert To Keyframe Advanced completely. The easiest way would be to load the EDAPT Shortcuts or re-assign [ F6 ] and [ Alt+F6 ] to this command.
All older versions of Flash retain the metadata between keys just fine.
Addition: June 2018
The above also applies to the use of Smart Graphic Control panel, introduced with v.4.0 of EDAP Tools.