As you may have noticed earlier in the week, there's an update available for the Ovi Store application. You should now be able to get this update automatically by just starting the application as normal on your phone, and it will present you with the option to update it. Follow the on-screen instructions to make the update happen, and if it gets stuck after the download select "Options" and then "Open" to start the update's installation.

The new app version looks and works just like the old version, but some bugs have been fixed apparently.