Hi globalunite,
This process is done automatically, although there is a time lapse.
Our listing maintenance, which updates current price, high bidder, high bidder feedback, bid count, currency, and end time on your active listings page is typically done about every 6 hours.
Once your updated prices are reflected on your active listings page, they should be displayed in your store window the next time it refreshes, which it does about every 2 hours.
-Mike