'just do a new version' ... Howard already said the same ... am just re-phrasing ... Strongly suggest getting the most recent 1.9 code (1.9.19). Then login and hit notifications. It might be a minor upgrade 1.9.x -> 1.9.highest. It is the path of least change and the recommended step to migrate a 1.9 to a 2.x anyway. Do NOT go after a 2.x ... that will result in massive changes ... to DB and to data directory.
'spirit of thinkering', Ken