I found this section in the settings.xml file in AppData/Roaming/FreeWorship:
I was able to change the size and capital letters here and make it work on the UI.
However, I don't know what options I can set for the AlertColour.
Does anyone know what the options are? I tried changing BlueBulletin to RedBulletin, but that gave an error.
I also tried #ffffff, but that also gave an error.