Allegra Watkins

Im unable to log onto SL. I am using version 1.23.5 (not having wanted to upgrade) and now its telling me that because of recent changes with usernames, it may affect my ability to log in with older viewer... It gives a link to a "help" page but it does not really help at all... it tells me the difference between the old names and the new names and how to log on to new viewers with your old names. BUT not how to log on as usual on my old viewer. I still do not want to update viewers, is there anything i can do to fix this? Any help would be great :)