Only to remind you about some stuff ;-)

      Disclaimer:
      You are using this on your own risk!

      This material is freeware. You are allowed to copy it without
      restrictions for any use.

      No payment of any kind may be charged for this product or any
      combination of products or services including this product without
      our authorization and official written license.
      You take full responsibility for the operation of this software
      and any conssequences thereof. We the creators cannot accept
      liability for damages or failures arising from the use of this
      software.

Files included in this archive:

Readme.txt - this file
File_id.diz - description file
Whedit.exe - The Editor 
NPP.NFO - NoT! PoWeR PRoDuCTioNS Info file
NoT.FiL - Add for NPP BBS
Svgm0.map - example edited savegame
Svgn0.dat - second part of savegame

If all the files mentioned above are not in the archive then you don't
have the official one. ;-) This editor works on the Demo version of the
game, so I don't know if it works on the full version, but try it maybe
it works you never know.