Redactor is an alternate composer, to be used in lieu of the default one. You should reread the setup information from the plugin's post on the forum, and its GitHub page to ensure you make the necessary changes.
@ThingBreaker I think i tried it after disabling the default composer and markdown plugins. But it is not working. There will be no styling or anything if i save the post.
@chez Update your nodebb, make sure no CSS you have is changing anything
see if it works with a different language too. (one with left-to-right layout.)
@baris public/templates should be the last thing that matters, since you can define the templates folder in your plugin.json.
Edit: got it working somehow. I vaguely remember being forced to adept to the admin/plugins/* structure though, so I'd still like to know if this is still the case.