Long story short I tried upgrading a site to use the nightly build 4.10 build 629 but after it didn't work I reverted the upgrade.

I'm sure I have reverted all the files however I am getting an error when I try to edit any document.  It seems to be related to certain data types like the rich text editor or upload.  This shows the error when trying to edit the home page with a rich text editor property.

[NullReferenceException: Object reference not set to an instance of an object.]
   Umbraco.Core.IO.FileSystemProviderManager.GetFileSystemProvider(String alias) +38
   Umbraco.Core.IO.FileSystemProviderManager.GetFileSystemProvider() +135
   umbraco.editorControls.tinyMCE3.webcontrol.TinyMCEWebControl..ctor() +171
   umbraco.editorControls.tinyMCE3.TinyMCE..ctor(IData Data, String Configuration) +420
   umbraco.editorControls.tinyMCE3.tinyMCE3dataType.get_DataEditor() +122
   umbraco.controls.ContentControl.addControlNew(Property p, TabPage tp, String Caption) +144
   umbraco.controls.ContentControl.CreateChildControls() +855
   System.Web.UI.Control.EnsureChildControls() +181
   umbraco.controls.ContentControl.OnInit(EventArgs e) +122
   System.Web.UI.Control.InitRecursive(Control namingContainer) +132
   System.Web.UI.Control.AddedControl(Control control, Int32 index) +276
   umbraco.cms.presentation.editContent.OnInit(EventArgs e) +1004
   System.Web.UI.Control.InitRecursive(Control namingContainer) +132
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1969

Can anyone help me fix this.  Although there is not content added to the site it would be a pain to have to set it up from scratch again.