All available activations for that code have been used. Error code: 603

The license allows me to install TurboTax Deluxe on 5 computers; I only have it installed in two computers, but on the last two updates it has requested me to provide installation code. Now when updating Turbo Tax I get "All available activations for that code have been used. Error code: 603". Please help; I already tried manual download and deactivating firewall; both did not work for me.