To update everyone's custom title to their current title you can use this sql:

update ubbt_USER_PROFILE set USER_CUSTOM_TITLE = USER_TITLE

As for the change. I'm not just being stubborn because I don't want to change it. It was a change to get rid of complaints/problems/false bug reports. People would put custom titles for users, update their user titles and then overwrite all of their custom titles.

What I will be doing is making it so you can decide to display just one or the other. IE. if a user has a custom title then only the custom title would display, not just the post title and the custom title. That way it basically works as it did before, but custom titles are stored in their own field, so we don't have the problems I mentioned above.