use the wallets->key import tool
This is exactly what i tried, but i imported the json file also before, but i had some missed transactions because my old client 0.9 was not fully synced,
then ozvic uploaded the fully synced blockchain, i rescanned and exported the keys again and now i tried to import the "updated" keys into the
2.0 client and it does not work, because the client says "wallet is already imported".
You can try to create a new 'wallet' in the webwallet and use this new wallet to import keys.
I'm not sure if it is save to have the same keys into 2 different wallets, usually it should work, but because it is not a usual migration (completly different blockchains), i'm not really sure.
Does anyone know, if it is save, to import "updated" wallet file (already migrated to 2.0 but forgot to sync the wallet, so i have missing transactions with the first trial),
into a completly new 2.0 account, because if i try to import the "updated" wallet file into my usual 2.0 account, the wallet says "wallet is already imported", but there are some
additional keypairs, so it looks like the only option is to import it into a new 2.0 wallet.
Just want to be sure to avoid further complications.
thanks in advance