Yeah, there are some clever things going on with the way the custom startup scene is handled, even across different versions. For instance, when launching V5 beta it will still know if a startup file has been set in V4 and will open this up on startup.

(I am actually not 100% sure if I like this or not, as that would mean that MOI is somehow storing some extra data or path outside of its config folders. Or perhaps it is running some kind of test to see if a previous version has been installed, and fills up the startup file field in the ini of the other version accordingly ? I certainly wasn't expecting V5 beta to open up with my custom startup file and hotkeys without being prompted for a transfer of .ini preferences beforehand. Meaning that it is then unclear if V5 is pulling its config data from the v4 .ini, or the v5 .ini ...).

From there I would think that these extra/user-defined default styles you are recovering are coming from your user-defined startup scene. Meaning that the feature to retrieve the default styles is perhaps slightly mislabeled, as it is not only regenerating the default styles, but it is *also* seemingly recovering the ones from the user startup scene. "Add default styles and custom styles from user startup scene" would be more exact.