SWF & FLV Toolbox - Unprotect

 
This option removes the so-called protection tag from any SWF file. Protection tag prevents SWF movies from being imported into Macromedia Flash. Thanks to SWF & FLV Toolbox you can get rid of it and retrieve your SWF files you have protected earlier. 

Note: this option is not available for Flash video files (FLV).