The fix is actually quite simple. All you have to do is set the desktop resolution to 800x600.

Then the game will appear to be in full screen. But if you have a modern monitor it will have black borders. Yet it will still be large. You can position the window with your cursor so that it covers the entirety of screen and it will be like an old school movie with black borders.

It feels great to play that way because aspect ratio is preserved and all the HUD is clickable the way it is intended and also is easy to read unlike the full screen fixes.

If you do not play around with the icons when you revert back everything should remain as it were.

On windows 10 right click Desktop, choose Display Settings and set Display Resolution to 800x600





then it will look like this



then I suggest you force Vsync on the game. If you got nvidia card it can be done in nvidia control panel

but you can also force it via game ini file which located inside its install folder

just open it with a wordpad or any text editor and copy it as follow.

To go into the game folder you should right click the game in your steam library choose properties installed files and browse

... in a full screen mode it was meant to be played without using any third party software