Found a widescreen fix. Instructions for various resolutions are in the file. Works very well on 3440x1440.

Main menu still glitchy as always.

https://github.com/XJDHDR/xjdhdr-random-code/blob/master/Game_related_files/City_Building_Strategy_Games_Series_files/Zeus%20%2B%20Poseidon%20v2.1%20-%20Widescreen%20fixes%20pack%20-%202019-01-13.7z