Hello Jim,
I remember there on some computers were problems getting the Vaadin project option into the configuration dropdown in the create dynamic web project view. If I remember correctly it was still possible to create a Vaadin project by clicking the “Modify…” button beside the configuration dropdown and from there choosing the Vaadin Eclipse Integration facet.
After creating a normal Dynamic Web Project it should also be possible to add the Vaadin facet through the Project Properties → Project Facets view.
HTH
/Jonatan