Short answer: there is no configuration file in LivePrompter 2. All settings are made in the Settings pages that you access via the “hamburger menu” (top left).
Background: the original LivePrompter (now called “LivePrompter classic” was a Windows-only software and configured via .ini files where all settings were made as text lines like “FontSize=12”. When I built LivePrompter 2, I re-worked the way it is configured and created the Settings page to make all confuguration settings using a GUI. no more liveprompter.ini.
Behind the scenes, LivePrompter 2 still uses files to store configuration data, but these are a different format (JSON) and are not meant to be edited directly by the user.