TNT duping is back (confirmed working in latest 1.13.2-R0.1 build) however if you were already using this plugin you were protected as it uses rails which are part of another exploit that this plugin fixes. I went ahead and updated it to flag this as a TNT duper in the notifications and logs. I did NOT make a new configuration entry for this as it overlaps with the rail/carpet dupe methods so as long as you have PreventRailDupe: true in your configuration your server will be protected.