Hi ,
When saving a file, Flash CC continues to provide the options of saving to a Flash document (.fla) or uncompressed document (.xfl). The resulting XFL file is internally stamped with the Flash CC file version. However, since Flash CS5.5 and later releases are able to open “future” versions of XFL files, Flash CS5.5 and Flash CS6 can both also open Flash CC files. Consequently, you will not see options in the Save As Type drop-down list to explicitly save to an older version of Flash.
As part of their future-compatibility efforts, the older releases (ie. Flash CS5.5 and CS6) will simply “skip over” these new features, but continue reading the rest of the XFL document. For example, Flash CC introduces the ability to apply filters, blend modes, color transforms, and cacheAsBitmap with opaque background to compiled clip components, such as ‘FLVPlayback’. As a result, Flash CS5.5 and Flash CS6 would skip over the new data when opening a Flash CC XFL file that contains this new feature.
Hope this helps !
Thanks and Regards,
Sudeshna Sarkar
Adobe Flash Professional Team