go to your men of war folder then to resource and you will findd the folder maps.If you dont find it then go to file explorer click your user files,then at the address bar at the end add /Appdata/local/virtualstore and you will find your men of war folder there with the maps folder.it is just very annoying that microsoft doesnt allow games' files to get stored on their folder.
Example:windows key+r,type C:/Users/Username*/appdata/local/virtualstore
*type the name of the user just click start and you will find out