Kilograms instead of grams after upgrade to 2.010

[Jannie]

I'm busy making a large shop with 180 categories and about 2000 articles which are not that heavy so I put them al in grams because of the prices of shipping.

After I upgrade my virtuemart to 2.010 all my product changes back to kilograms. So now a product of 650 grams weights 650 kilograms. The shipping is not possible now. Is there a solution for this because it's not funny to change everything by hand...
In the configuration a made it gramms allready but it stays the same

Thanks
Jannie