Look for List subforums in legend: and List subforum in parent-forum’s legend: in the forums settings
I've done same, it still didn't show!!
For both subforum and parent forum ?
Installed, but my board still doesn't show sub-forums?????
That's pretty normal, you DO NOT have YET any sub-forum(s) on your site/board!
You have a Board with forums, that's it.
Use Search Button to get Instant Results... pls.
That's your edit after the time of my above post, but while visiting your board again I don't see any sub-forum, again, nor I see you installed the extension I provided you the link to, enough said.
Before I post here, I make sure I've searched, if my search results don't satisfy me, I have to create new topics on that!!!