Sorry about that. Well, just to let everyone know if they happen to have this problem, I fixed it. The way I did so is, I had the verison that I used still saved on my computer. I opened the modules folder, then re-uploaded the forum folder to my site and it worked.
Server specs (Server OS / Apache / MySQL / PHP / DragonflyCMS):
Linux Dragonfly 18.104.22.168 PHP Version 4.3.11