If I remember correctly, CC3 is a 32 bit program and thus has a RAM limit that it can address. 4GB?

There is a vector coffee stain in Modern/Furniture (Office). There is a mug on one of the desks that can be isolated and saved as well.

See my gallery on "The Newcastle - a study in Map Styles"

There is a problem with Win 10, if you do not have a mouse that is win 10 compliant it will double click. I had a nice Logitech mouse that I really liked, then Win 10, I ended up buying a new mouse, solved all of the problems, except that it does not work as well as the old one did before win 10. :(

Looking at your city it seems to me that it is big enough that I don't think I would put in all the buildings. I would put in the important ones but not all. Then make closeup maps of the areas that need it. So if your party goes to the "Inn of the Old Sign" but there is no combat in the area just put a dot on the map with a label. Does that all make sense?

I think you are correct, there isn't one, but we certainly could use one (or more).