In general, I’m open to adding new export formats, but .swf is much more complicated. SpriteLoop does not have scripting or tools for vector graphics, which you would probably need for HUDs. SWF is a full multimedia format with audio support and much more.
For a legacy format, it would require a ton of work, so I don’t think I will be able to add support for it at the moment. I’m actually a bit surprised it’s still being used. 😁