How can I "re-hook" my worksheet window to my Excel window?
 

I solved it! It turns out that all I had done was to minimize the ribbon. I
thought the ribbon was like a border separating the quick-start menu from the
rest of the worksheet. I decided to check the tutorial for the 2007 version
and found out that the ribbon is the whole top of the worksheet. It includes
the groups, tools, icons, - all of it. When I saw only the names of the
groups, I was looking at the minimized ribbon.

I clicked the drop-down to customize the quick-start menu, and the bottom
option was "minimize/maximize" ribbon. Problem solved. And now I know why it
always looked the same with only the group title visible, even in a new
worksheet.

But Thanks anyway!