Hi all, So in SC3K you could do "File Save As" and easily save your city under different file names as you progressed. I was disappointed to see that you could not do this in SC4 but figure maybe it would goof up/complicate region play which didn't exist in SC3k. So what I do is from time to time, like before radical risky changes, I "Control Alt Delete" and then click on Task Manager and copy my city file from MyDocuments/SimCity4/Regions into another folder. I think it is important to copy them into a different folder because Simcity4 seems to do some cleanup/delete of files that it doesn't need in the Regions folders. Like I said, it's primitive. Anyway, if you need to go back to an older version, exit out of the city/back out to region then just copy the city file you want back into the specific regions folder, change the name back to the original and reload the city.