Unity Pro/Control Expert. Is it possible to edit a derived data type and save it under a new name?

Right click on the .DDT and export it.

Right click on Derived Data Types in the Project Browser and import the .DDT.

Double click on the new structurename_0 in the New Name column and Rename as: Newname and hit the <Rename> button. <OK>.

You can then edit the .DDT. <OK>.