Question: if I use PaperUI instead of addons.cfg, is correct that I have also to this addons.config? It’s something I need to manage manually when I install a binding via PaperUI?
Yes you’ll still have the addons.config file if you only manage addons via Paper UI. That’s the file where the addons installed via Paper UI and defined in addons.cfg are persisted. Usually it should stay in sync with the changes you make in Paper UI.
If you once used addons.cfg and commented the lines they remain in the addons.config file.