Hi Burr, the one to look for is in the [Commands] section:

[Commands]
UseDiameterDefault=n
NonRepeatingCommands=delete undo redo
DoNotRepeatShortcutKeys=n
LightingOptions={"selected":"My Favorite","themes":{"Default" <....> { lots more text on this one entry }
<...>

Your old moi.ini should have [Commands] LightingOptions=... but it will not be there in a new default created one.

- Michael