I’m frustrated

Photoshop: Problem opening files - Mac OS X 10.9 Mavericks

Can not save changes made to a file done in Photoshop. Can't open a file from Photoshop.I updated my Mac Book Pro last night 10/26/13 and this morning 10/27/13 ran the Maverick program. Now I'm having Photoshop and Premiere issues. In Premiere I can not open a file or import from the File Menu. These are 2 basic commands that should be at the top of the list commands to work properly.
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