The below items are things to be aware of, when upgrading from Craft 2 (v0.x) to Craft 3 (v1.x).
If you need to re-attach the structure, for whatever reason, you can use the following console command to re-assign the structure's UID to Comments' settings.
There's no longer separate templates for each status. Where you might have had:
This is now handled through a single
Templates received a major overhaul in Comments 1.x, and it's best to refer to the latest templates. There are too many changes to list here, and the fundamental structure and implementation of the updated templates have changed too much to guide through changes.
You can always view the Craft 2 version on Github
Available for Craft 3. Get it from the plugin store.