How to reset/remove a shortcut? I have just started using Blender but I feel stupid that I can't find how to reset/remove shortcut added through 



By accident I have added a right mouse to Remove Doubles so my right click functionality is gone. Every time I right click Blender tries to remove doubles and I can't seem to be able to reverse to standard behaviour..

I have tried exporting/importing factory settings through user preferences ( Input tab ) but that didn't work.

So can you please point me in the right direction how to reset the shortcuts?

Using Blender 2.69.
You can reset the shortcut in the User Preferences (Menu / File / User Preferences) Ctrl-Alt-U 


Select the input tab 
Searching the command 
Click the x right to the shortcut to remove the shortcut.