Thank you! For the v2, it was mostly art cleanup and adding more tiles/colors. There are some new city types. We tried to avoid moving too much around, but a few things got rearranged while making color variations (mainly the big mushrooms and a few buildings on C) so switching the files could cause some minor breakage. My advice is to make a backup of the tileset files, drop in the new ones and see how it affects your map. If it breaks too many things, maybe keep the old version of C and replace the others so you can make use of all the new tiles. Hope this helps!