James-Taylor1582, yes despite opening a ticket with Magix. I did discover, however that it was my antivirus software (Panda) that was "causing" the error. I cringe every time I do it, but I disable both the firewall and the antivirus software temporarily while I access the catalogue, and immediately re-enable after downloading what I need.
Panda allows you to add exceptions for programs to access the Internet, it should have done this automatically for XDP, and if required not be 'realtime' scanned.