this is what i did now:
i ran the old wallet that is not syncing anymore. i got the priv key. i closed it. i removed all files from the roaming, but had to put the aliencoin.conf file back for the nodes.
i ran the new wallet and it loaded the blocks with a new adres. when i import the priv key i get this:{"code":-5,"message":"Invalid private key"}
i also did this:
i ran the old wallet that is not syncing anymore. i got the priv key. i closed it. i removed all files from the roaming, but left aliencoin.conf and wallet.dat.
i run the new wallet and it loads the blocks with no wallet adres. when i import the priv key i get this:{"code":-5,"message":"Invalid private key"}
the second one doesnt make sense, if u leave ur wallet.dat u simply will see ur old wallet ^^
make sure again u noticed the right privkey
u may have to use :walletpassphrase pw 600 to unlock ur wallet if u encrpyted it
make sure u repeat this FOR ALL Adresses in ur old wallet
move the whole folder to another place, while wallet is NOT running
there should be NO folder anymore, no config nothing
start aliencoin from fresh, import the privkeys
it will take a while to find peers, to reload and scan the blockchain