Thank you for your quick reply !!
I did it and it works, the list has 1 method.
Unforetunetely, the main problem is still present, the table bak_virtuemart_shipment_plg_weight_countries is no more completed since I updated from M version. I use now the RC3 f and j1.7.
So, when I view an order in orders list, this error message appears: SELECT * FROM `#__virtuemart_shipment_plg_weight_countries` WHERE `virtuemart_order_id` = 47
The structure of this table is normal I think:
id
virtuemart_order_id
order_number
shipper_name
order_weight
shipping_weight_unit
shipper_cost
shipper_package_fee
tax_id
shipper_id
And the installation of AIO seems ok. The plugin files "weight_countries.php" and "weight_countries.xml" are modified.