If you are Windows user, right click on desktop, select "Screen resolution" in the pop up menu, and just change the res there to a non 4:3 aspect ratio. This will allow you to run the game and see all menus to config the mod content and city settings at your will, once done, you can repeat the process to return to 4:3.
Its an usefull tweak until the author fixes that for 4:3 screen users.
How to backup your savegames? Tried to simply ZIP SAVES folder, but after deleting saved games and try to restore them, it turned out it didnt work and lost everything, and the savegame slots are shown as empty.
TIA