I think, after testing in the sandbox vault, that it’s the plugin titled Importør af Markdown-format
(Sorry, I don’t speak Danish 
)
Once enabled, it’ll appear as an icon in the ribbon or you can open it from the command palette (ctrl/cmd + p)
If you need it to convert the tag, alias, cssclass properties to tags, aliases, cssclasses, it will be the last option within the plugin…
