You can update your client by just opening the Ovi Store client on you mobile. We don’t have official changelog yet, but the updated client is now improved and fast. The update is about 4.29 MB in size. Hopefully it should have fixed the bugs present in older version.
If you has not received the new Ovi Store update or needs to re-download the Ovi Store for any reason, here is the direct download link to the Ovi Store clent:
http://store.ovi.com/content/5406
Latest Version => http://www.nokiavnn.com/2011/08/nokia-ovi-store-app-client-v212043.html
