Hi If I open Hypershade, I need to remember to save my file, because Hypershade might crash Maya.
I found this node can be removed then Hypershade will open:
Script editor:
select -r "hyperShadePrimaryNodeEditorSavedTabsInfo*";
delete;
I noticed the node sometimes looks a bit crazy in the Connection editor, see attached.
It might be wise to have the software not save these nodes.