oops, I edited the message with the explanationsagain while you where posting
So when you try both suggestions, you don't even see the Circle with the down facing arrow, on the Browser? and, pushing it, select "dock on the palette well"?
If not, try again deleting your preferences: hit SHIFT+ALT+CONTROL when you click on the Photoshop icon (you have to launch it from the program icon)
You should see a message asking if you're sure that you want to delete your preferences...
Please tell us if you've seen that!
You can also simply search your hard drive for a *.psp file and delete it. It will be called something along the lines of "Adobe Photoshop X Prefs.psp".
;\ Sorry if I sounded harsh... of course one cannot know everything about our beloved program. No one knows everything!