This works as advertised:

In the View menu and on the right-click popup menu when you right-click on a node in the view, you'll see a new menu - Freeze Node on Double-click. By default this is unchecked.

If unchecked, when the user double-clicks on a node, it opens the ESB editor with that particular component selected. The only exception is when you double-click the root node that is now named the same as the file you have opened. In that case, it simply opens the file if not already open. In both cases, the editor gains focus.

If checked, double-clicking on a node freezes it in the view. The visual indicator is a wider blue border around the frozen node. Double-click again and the node is unfrozen and the node border returns to normal. If frozen, the node will stay in place when the layout is refreshed or changed.

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One thing - the node-freezing seems to be global - if you right click/freeze one node - they are all frozen.