How to delete from palette

I created a frame and stored it in the palette. Later I wanted to modify it,
but I did'nt find the way to replace it, neither to delete it.

To delete it I right clicked on the component in the palette, choose
"property", got a list of component, highlighted my frame and clicked the
delete button. Now the frame does not appear any more on the list, but
trying to store with the same name the modified component, I get a message
that it is already present.

Any idea guys ?


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