Hi Lisa,
Adobe really did try to fix it so that we had to deal with that Welcome screen, and the ads, every time!! Older versions offered you a choice but with PE7 there is no choice.
One workaround is to tweak the shortcut to the program. Right-click on the PE7 shortcut icon or the program name in your list of Program Files. In the Properties dialog box click on the Shortcut tab. Change the path from Photoshop Elements 7.0.exe to PhotoshopElementsEditor.exe. Click Apply. The next time you use the icon it should open in the Editor workspace.
"C:\Program Files\Adobe\Photoshop Elements 7.0\PhotoshopElementsEditor.exe"