Here is the situation.  Using 4.9 version of DNN and latest available forums module (4.4.3) I setup a beta forum on my site.  I set up 4 seperate forums, General, Project Talk, Marketplace, and Off-Topic.  They all worked fine until I went to edit the properties on one forum (add some text to the decription), and when I clicked edit I get "A critical error has occurred. Object reference not set to an instance of an object."

In the eventviewer I get a module load exception and a page load exception.

Here are the two stack traces:

Page Load Exception

AssemblyVersion: 04.09.00
PortalID: 0
PortalName: Ravens Crest East at Princeton Meadows
UserID: 3
UserName: Justin
ActiveTabID: 94
ActiveTabName: Forum beta
RawURL: /cms/Forums/Forumbeta/tabid/94/ctl/ForumEdit/mid/529/forumid/1/Default.aspx
AbsoluteURL: /cms/Default.aspx
AbsoluteURLReferrer: http://ravenscresteast.easycgi.com/cms/Forums/Forumbeta/tabid/94/ctl/ForumManage/mid/529/Default.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; Media Center PC 5.0; InfoPath.2; .NET CLR 1.1.4322; Zune 3.0; SPC 3.1 P1 Ta)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 4cb3e21a-700a-4b26-8614-961c93d84395
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Modules.Forum.Controls.ForumPermissionsGrid.Savev13wstat3
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Modules.Forum.Controls.ForumPermissionsGrid.Savev13wstat3() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Control.Savev13wstat3Recursive() at System.Web.UI.Page.SaveAllState() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---
Source:
Server Name: WEB83

Module Load Exception

ModuleId: 529
ModuleDefId: 151
FriendlyName: Edit Forum
ModuleControlSource: DesktopModules/Forum/Forum_ForumEdit.ascx
AssemblyVersion: 04.09.00
PortalID: 0
PortalName: Ravens Crest East at Princeton Meadows
UserID: 3
UserName: Justin
ActiveTabID: 94
ActiveTabName: Forum beta
RawURL: /cms/Forums/Forumbeta/tabid/94/ctl/ForumEdit/mid/529/forumid/3/Default.aspx
AbsoluteURL: /cms/Default.aspx
AbsoluteURLReferrer: http://ravenscresteast.easycgi.com/cms/Forums/Forumbeta/tabid/94/ctl/ForumManage/mid/529/Default.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; Media Center PC 5.0; InfoPath.2; .NET CLR 1.1.4322; Zune 3.0; SPC 3.1 P1 Ta)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: f29be911-3aea-42b8-a4fe-42f1c5633aca
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Modules.Forum.ForumEdit.PopulateForum
StackTrace:
Message: DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Modules.Forum.ForumEdit.PopulateForum() at DotNetNuke.Modules.Forum.ForumEdit.Page_Load(Object sender, EventArgs e) --- End of inner exception stack trace ---
Source:
Server Name: WEB83

Please help me!!

At some point there was a 3.x version upgraded.  It has never worked since then.  How can I completely uninstall every trace of forums so the system is like new?  As for permissions, there is modify permissions on the entire application including all subfolders.

deleted.