Or you could just delete the map.png from a track with a bad map and Assetto Corsa generates a new one for you the next time you load the track... If for some reason that isn't working for all the tracks you need then this is handy.
really good for replacing missing track layouts , but ... I would like the track layouts to be the same resolution as the default ones. The layouts it records are great.. just not big enough. is there a way to increase the resolution of them to match the originals please ?