.swt file: how to open it on Windows

1 Windows app registers the .swt extension. Install one of them to open the file with a double-click.

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  JPEXS Free Flash Decompiler

  JPEXS Free Flash Decompiler (FFDec) is opensource flash SWF decompiler and editor. Extract resources, convert SWF to FLA, edit ActionScript, replace images, sounds, texts, fonts and more. Various output formats available.

  Open source 26.4.0 ★ 6K

Related guide: Change the default app for a file type in Windows