As i said - you don't need to contact Cornucopia3D, you only need to download the correct version. There is a popup menu where you select the serial number for which you want to have the item. You btw as well can simply purchase the item(s) again, the system will recognise automatically that you have pruchased it already and does not charge you for that again. For me this is faster than to first find it in "my purchases", edit and then redownload the thing.

One day your ship comes in - but you're at the airport.