From Yga Software:
Yga SWF Importer is a powerful Adobe Flash extension for importing the SWF files to Adobe Flash. Compared to the fundamental function provided by Adobe Flash, SWF Importer can import the stream sound and action script as well. Some important features and limitations are as follows:
1. It can import SWF version from 1 to 20.
2. It can import all types of element that include: graphics, button, movie, sound, image, video, text, animation and action script.
3. It supports Windows XP, Vista, Windows 7 and Windows 8.
4. You should install Adobe Flash CS5.5 or CS6 before Yga SWF Importer.
5. The animation would automatically be converted to static frames, and the static text would automatically be converted to graphics when importing finish.
6. The action script will be lost if the SWF is protected by script-obfuscation software.
7. The trial version can importing 5 SWF files with full services.