The buttons for inscribed and circumscribed polygons have wrong commands.It looks like they were copied from Rhino5 which does not work in Rhino6. They should be respectively:
! _Polygon _Mode=_Inscribed
! _Polygon _Mode=_Circumscribed
Hi John- as far as I can see the shipping toolbar is as you describe - try running ToolbarReset
and restart Rhino. Any different?
-Pascal
Yes, it is good now - thanks Pascal!