They should re-dock if you drag them by their banner up to the tool-bar space.
Hi Yrokes - we've had similar problems when toolbars won't re-dock.
Close out of CES, delete the 'ces.ini' file (or rename it if you prefer) then re-open CES and it will return to the 'default' locations.
The 'ces.ini' file can be in different location depending on your installation. Local WDIR maybe, but more likely in...
Hope that helps.