Did mine myself after returning to the game and with all gun position and some towers it is time consuming -along with everthing else that has to be ajusted or DLed. When I had left, I said never again and killed everything.
So anyone who is thinking of entering AH re-hab and thinking deleting the game is the only way out :Save your settings, views, terrains and skins at the vary least. You may have a change of heart.