Do not just save the .FLA . Save the .AS (ActionScript) files as plain text. If the proprietary format dies forever, the raw code can be ported to Haxe or JavaScript.
Improved workflows with Photoshop and Illustrator, bringing Flash into the core Adobe ecosystem. adobe flash cs3 archive
: Download the "standalone" or "projector" version of the Flash Player from the Adobe Flash Player Support page (if still hosted) or archived sources . Do not just save the