How to reset the MissionControl/Expose/Spaces settings to defaults on Lion? I set Mission Control to "Show Application Windows" (Expose) with a mouse button or hot corner.  Great, it shows all of the windows of the current foreground app across all spaces/desktops.  

However, I can't seem to get it to switch to the desktop containing the window I select, making it rather useless.   Is there another hidden option to do this?  How else are you supposed to use Expose to find app windows across spaces and bring the found window to the front?!

Also it would be great if there were a way to go directly from the Mission Control display (multiple apps, pile of windows, scroll to spread 'em) directly to the Expose showing all of the windows unpiled for the selected app.  Anyone?

Seems Apple is about 80% of the way there on this one but despite the fancy graphics is missing the most basic use case. No wonder people want to revert to Snow Leopard.

Update:  seems there is a problem with the settings, perhaps due to the system being migrated from a SnowLeopard machine.  Creating a new user acct on Lion does not show the problem--Expose works correctly (it switches) for the new user.   So, now I've updated the question to  "How to reset the MissionControl/Expose/Spaces settings to defaults on Lion?"
just go to system preferences click keyboard and disable launchpad and mission control then 
click trackpad and go to the third tab and disable mission control and launchpad