For anyone else who seeks the original file "AbacusEZ-LandmarkGNISDatabases.exe".
On the Tongass Fjords page – http://www.mistymoorings.com/tongass/index.php – on the Misty Moorings site, you'll find a (now dead) link to the file:
http://www.flightsimdownloads.com/pub/AbacusEZ-LandmarkGNISDatabases.exe
Got to Internet Archive and enter this link in the Wayback Machine, and you'll be able to download it. Simple as that.
https://archive.org/