When downloading it doesn't name the project

How come it doesn't name the project when i press download, or tell me where to save it. Its very annoying. now I have duplicates of heaps of photos called the same thing. It's very confusing, and a waste of data since I make a tiny change, and have to save it to see how the image looks inside of another program. So I save 10 times, it saves 10 files, it should overwrite or tell me where to save it. This is just 1 image, imageine when I do 70 images. I'm going to need a big hard drive.