How do I get rid of the 01 at the topleft?

I have an old Photoshop 7.0 which works fine. Every so often a 01 will appear at the top. I go to View and uncheck slices which removes it. Today when I go to view I don't see slices. I see Lock slices and Clear Slices both of which are unchecked. How do I get rid of the 01