I’d been a keen user of this until a while ago when they completely overhauled the UI in a way I couldn’t figure out all, when I abandoned it.
I can't remember how many time I have disabled restrictions globally and always forgot to turn it off because the icon says nothing.
If a simpler interface is preferred then it's already possible to blacklist JS in Chrome and enable it per-site by clicking to the left of the page address for the access privileges.
It really is simple to figure out, if you can't, maybe you need an easier plugin that just toggles JS in general.