PROVIDENCE, R.I. — A state District Court judge agreed this week to file the case of a 77-year-old Tiverton man accused of exposing himself near La Salle Academy.Judge J. Terence Houlihan Jr. on Wednesday accepted a not-guilty filing from Steven Morgenstern, of 83 Watermark Drive, Apt. 83, to one count of indecent exposure for the June incident.