The only fix to the 500 server errors we were getting was to use a FRESH install of the forum software and importing my database onto it. Unfortunately, some of the avatars which were uploaded by members got corrupt. I made backups but apparently there is a bug in how filezilla transfers content to and from the server. I was unaware of the "binary" transfer feature which could have avoided problems with content backing up.
Please let me know if there are any bugs with the forum. For the most part, it appears that most of the functionality has been fully restored. I may consider dropping some of the older boards in favor of consolidating the database.