Scope of Replacement
It’s important to note that the search/replace is recursive. It will always drill down into all compounds beneath the inital viewing location in the tree.
When you launch the tool from the menu, it stores the current location of the ICE Tree Editor in the entry called “Ice Tree” (at the top of the dialog). This is where the tool will perform the search and replace. This means that if you view the root of the ICE Tree and run the tool, it will operate on the entire tree. If you are inside a compound, it will only run on the nodes contained in that compound.
If you view a different tree or use another ICE Tree editor, the Replace ICE String tool will not recognise you’ve changed what you’re looking at and will still operate on the original selection, so be careful! To change the location, just open a new Replace ICE String tool dialog from the ICE Tree Editor.
Quoited from http://www.andynicholas.com/?p=1096
Handy little tool. The only problem that i fount with it is the preview doesnt work on set data nodes.