I currently work on a forum by the name of MassiveCraft (http://forums.massivecraft.com). The previous 'head' admin/manager was cast from the MassiveCraft community for reasons I shall not divulge. As the next in line, I became the Forum Manager. I have had some prior experience and am good at managing them based on the skills I was taught by my predecessor; however, I was never taught how to upgrade/install add-ons for the forums. I have FTP file access and the Admin Panel and I have read some documentation on how to do this, however it isn't very detailed.
If you visit the forums, posted above, you can see that they are outdated. The Forum BB Codes are outdated too, causing spoilers to break and other things such as this.
Would anyone be able to assist with this?