Try this...
1. Rebuild the style list by clicking on either of the buttons on the lower left of Stylepicker.

2. Click on "Clear" (#1 on the image below).

3. Single-click on "Date" (#2 on image above) so that a a
single asterisk is present next to date. This indicates that the sorting is from the most recent. (Double-clicking will give two asterisks and is not what is wanted.)
4. Scroll to the top of the style list.
Any luck? If not, re-install the Xtra Pak and work through steps 1 - 4 again.
Hopefully this will help.
Regards,
Noel