I have had designer crash everytime I have done this.
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From the views list, copy and paste an existing view.
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Open the “copy of” view in designer
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Mark the “Copy of” part of the view name in the view properties and press delete
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Now, with the focus still on the view properties dialog, click on the views list tab in designer as if to look at the list other views
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Dialog appears, “A folder or view with this name already exists”
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Designer then hangs and no longer responds
Let me know if you want a screenshot.