This may be what you're looking for. This setting allows the user to set any style as the default when there's a missing Style. The dialog page is in Preferences in the Arrange Tab.

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BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.