Why does my render always save my last project and I can't start with a new one?

So, I have started playing around with Render Player. I save the Image of the project that I'm done with and when I get back on, it's still there... Well, the project that is. I can't start a new one because I don't really know how. Keep in mind that I am still new to this. Please help.
Asked Apr 06, 2015

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