Cannot Edit Instrument

Hi

When I click Edit Instrument in Setup Mode in Dorico 5, nothing happens.
This only occurs with players that were imported via MusicXML 4. It seems Dorico is not recognizing the imported staves as editable instruments. My Playback engine is NotePerformer 5.

Any help would be appreciated.

Regards,

CS

The green tab shows you the instrument is a percussion kit, not a single instrument.
If you choose Edit Percussion Kit, you can remove it from the kit and it will appear as a normal instrument held by that player.