Further info. Deleting the rdb folder and allowing EndNote to rebuild it will solve the typeahead problem. This suggests that the problem may after all be located within my EndNote database. Does that make sense?
But deleting the whole rdb folder means you’ve lost term lists and I’m not sure what else. Is it possible to specify which particular file(s) in the rdb folder is/are responsible for allowing/blocking typeahead, so that a more targeted deletion can be tried? Thanks.