The displayed game name can now be configured:

• Use title from RPG_RT.ini (default), this is now more reliable in combination with Improve encoding detection by making the string larger liblcf#488
• In the chat somebody disliked this behaviour because they use the game name to differentiate between different versions of the game, so you can revert back to the old behaviour now

In #3311 they considered A and B confusing because all games use Z and X in dialogs. This is the new default but you can revert it in the settings if you dislike it.