Regarding the poor resolution in the original versions, someone seems to have created a clean 1920x1080 version in the executable file for Lords https://ruproxy.forum.heroesworld.net/showthread.php?t=15563
In theory, this can also be done for older versions, but I have 0 experience with executable files.
However, the interface does not scale, and everything becomes small. It would be better to make it widescreen, like in 3.1, for 1.6 and 2.1