If you've updated to the latest version of Photoshop CC you'll see a new and unfamiliar screen. Photoshop is asking if you want to find a recent file or open a new file. (top photo below)
This can be very helpful but if you would rather not see this screen each time and go back to a more familiar start for Photoshop this is easy enough to do.
Simply open Photoshop and go to Preferences - General. Here you will see a check box that you can uncheck to stop this window from opening each time. (bottom photo below)
If you decide that this is indeed a helpful way to start, simply put the check mark back in your Preferences.
There are several new features to look at in the new Photoshop CC 2015. We'll take a look at some of these features in upcoming Blogs.