Toolset - lost Blueprint/Terrain window

Lost the main Blueprint/Terrain/Tiles window. Nothing I did could bring it back. Using the View/Options/Windows/Reset, although it had worked in the past, no longer worked.

Solution: Delete/rename the file in your 'Documents and Settings//Local Settings/Application Data\NWN2 Toolset\en-GB' folder called WindowConfig.xml

Local Settings is a hidden folder so make sure (for XP anyway) that you tick the box called 'Show hidden files and folders' in Explorer the Tools/FolderOptions/View.
You may also need to UNTICK the box called 'Hide Protected Operating System Files'.