Quest 5.0.1 is out now: http://www.textadventures.co.uk/blog/20 ... -released/

Great. And now I have internet again I can download it too.

The helpful error messages are a great imprivement, but some are still obscure:

System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at AxeSoftware.Quest.EditorControls.WFEditorTree.AddNode(String key, String text, String parentKey, Nullable`1 foreColor, Nullable`1 backColor, Nullable`1 position)
at AxeSoftware.Quest.Editor.m_controller_AddedNode(String key, String text, String parent, Boolean isLibraryNode, Nullable`1 position)
at AxeSoftware.Quest.EditorController.AddElementToTree(Element o, Nullable`1 position)
at AxeSoftware.Quest.EditorController.UpdateTree()
at AxeSoftware.Quest.EditorController.Initialise(String filename, String libFolder)
at AxeSoftware.Quest.Editor.Initialise(String& filename)
at AxeSoftware.Quest.Editor.ToggleCodeView()
...

What key was not present? What dictionary? What line?

If you could send me an example file demonstrating the error, I can make the error message more helpful.