Mark topic as read...

Seriously!

I'm running PunBB 1.2.21

Where the hell can I find the mod that marks a topic as read after you've read it?
It feels like I'v searched every possibly way, but still always come across:
http://www.punres.org/files.php?pid=46

Which obviously doesn't work. Please god, help me!

(sorry if I suck and all, but I'v lost my patience)