that's all
Topic on Extension talk:WikiMarkdown/Flow
You just download the git repo, which is linked on the extension page
Download link for the Wiki Markdown extension is broken. If you follow the link to download extension it takes you to a page where it says the extension does not exist.
How so? The download link takes you to the GitHub repo where you can download the repo.
Actually, I figured out which link you were talking about. I have since replaced that link with a link to the GitHub repo.