I'm using a MacBook with Snow Leopard. For some reason, I have accidentally enabled Japanese keyboard support (Kotoeri). Now, having disabled it, I face the following problem: My US English keyboard layout has changed.
The keyboard viewer displays some Japanese keys next to command, and in general the keyboard does not look like mine. In addition, some punctuation characters have moved to different keys, and some to inexistent keys.
Just to illustrate: The Yen sign appears now on the left of the Backspace, the underscore sign has moved to an inexistent key between Forward Slash and Right Shift keys. And there are more changes like that. The keyboard layout is set to US English.
I have tried Ukelele utility, but it only allows to remap existing keys, not to change them.
How can I roll back this layout to factory default?