I decided to remove the Kill Old Styles function in its current form as it was a lot of hard-coded styles that would (probably) only appear in documents found within my workplace.
I’ll rethink the Custom Styles screen to include a few more functions that allow more tinkering with styles in bulk. For now there’s a large gap where the old function used to be. I have filled in some of the gap with a temporary function to toggle the ‘Automatically Update’ status of all styles in your document. This will only be a temporary feature as there’s a lot more functionality I’d like to add re: styles but time is against me