[Forminator Pro] Poll Expiration

I guess this may be a tech support inquiry, if there's already a way to do this. But I couldn't find it. I'd like to be able to set a Forminator Pro poll to "expire" at either a set time/date or after a set amount of elapsed time since opening. I want the results of the poll to continue to be displayed, but for the poll to stop accepting new votes (and perhaps invite people who attempt to vote at that point to submit a comment).