love what you have done with the editor since V4 when i last played civ
the game im playing now i started with V11, and i had the place city with troops bug
V12 fixxed that, but the interface is messed up, im guessing because i still have V4 and V11 installed? basically the first 2 options(edit tile edit city?) are repeated infinitely along the window, so i can only open the other options if i remember the shortcut
anyway im thinking that will resolve itself either when i start a new game or maybe if i can figure out how to delete the old versions
sofar i have been unable to find a mod folder in the steammap/civ5 folder
i have done searched for ingame editor, IGE, editor, mod, mods, etc but still havent found it
i also encountered the add policy bug wich it sounds like you are aware off, and i had to use the free SP trick
i think there is also a bug, where if you add cities they wont affect your SP cost, to get around that i guess you can spawn settlers and build the cities