Can you make the .swf available to download?
Tried to upload a new archive or changing type of the uploaded file won't change anything in the release. Probably it's so old I cannot change download options anymore.
If you get ruffle chrome extension it allows you to download swf. Alternatively, here is an external link to get the file.
https://arda.kisafilm.org/fish/get/serve.php?b=car85swf.zip&d=12&s=itchio