Hi, well, I understand how obvious is that wish from the user point of view, but it is quite hard to implement because this button knows nothing about the species it modifies. It only applies to the current file path, which is empty when several species using different realistic files are selected.
The button is intended to let you update the plant geometry contained in the 3dm file after modifying the plant definition file from the plant editor. It got useful to solve your problem copy/pasting but it wasn’t added for that purpose. In fact we need to investigate why the whole geometry is not being copied from/to the clipboard. It was just a workaround
Alternatively, we could add this functionality to the update button in the context menu area. There a Rhino command is called, that can easily do the job for all species. We’ll need a progress bar since reevaluating 30 species can take a while…
(don’t try it yet, currently it just redraw plants, it doesn’t reload/reevaluate any existing geometry)