When I searching for FOV settings in the exe file in the hex editor, I changed all the values that I found on those given by the czarman in Psi-Ops and saved the settings.
When I started the game, I was shocked. I obtained a completely new FOV much better than the original ones
.I don't think that the game could change the FOV itself. Earlier I tested this game and the FOV in widescreen was exactly the same as in 4:3.
I need someone to verify whether the same method for PSI-Ops works in Archangel. I attach the screenshot with new FOV. You can compare the pictures with my report for this game. I also could run this game in 4K. I don't know why but earlier crashed to windows and worked up to 2560x1440.
This game is today abandonware so it can be still find on the internet.
My report for this game
http://www.wsgf.org/dr/archangel/en
And czarman method for Psi-Ops.
http://www.wsgf.org/forums/viewtopic.php?f=64&t=32936