Demo version error manual install

I'm getting 'The given key was not present in the dictionary.' when I try to load any page. I was able to successfully run the configuration page but the login page fails to load. 

[KeyNotFoundException: The given key was not present in the dictionary.]
   System.ThrowHelper.ThrowKeyNotFoundException() +28
   System.Collections.Generic.Dictionary`2.get_Item(TKey key) +7454012
   GleamTech.FileVista.FileVistaApplication..cctor() +1660

[TypeInitializationException: The type initializer for 'GleamTech.FileVista.FileVistaApplication' threw an exception.]
   GleamTech.FileVista.FileVistaApplication.get_AuthenticationManager() +0
   GleamTech.FileVista.FileVistaGlobalAsax.Application_AcquireRequestState(Object sender, EventArgs e) +608
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +68
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

As you say manual install, I suspect some files may be missing from the FileVista folder such as language files.
Whenever you do a change in FileVista folder, force restarting of the application by opening and saving the web.config file. This way you can recover from the error state if your action really fixed it.

Excellent. That worked.