According to the description:
”this plugin will control the number of open (unlocked) topics that each user group can have in each forum in a specific period (hour, day, week and month)”.
So if the user has more open topics that you set for that forum, he won’t be able to start a nee topic.
This, by certain group, term and forum.
How you’re creating the topic? Via topic posting screen? Or via API or another resource? If it’s via topic posting screen, it should disallow if the user has more OPEN topics than what you set for the user group for this specific forum. It worked fine last week in 4.6 when I tested to update the marketplace.
If you’re sure you set it all right, send a PM with an ACP account and I will take a look tomorrow. 👍