Those are user category styles txt files that list various sub-categories of RealTracks.
We will make a dedicated one for XPro 4 in the next patch.
There are various ways to list the XPro styles, typing XPro in the filter is the easiest.
thank you. I still hope it is the same as before. There is a list in "category".
Over the years, everyone has been used to it.
Although I can filter by entering text, I still like "category"
Let XPro Styles Set 4, Xtra13, Xtra14 appear in Choose User Category to display in StylePicker