clints.
Be very careful were you buy your key from! If you, for example, by a keyplug in the US but you live in Australia, the Australian version of ArchiCAD may not work on your new key plug.
For example. I live in Sweden, the US version of ArchiCAD doesn't work on Swedish key plugs.
The Australian, US example above is just that an example. The US key plug may very well work on an Australian version, but check up were the key plug is coming from before you purchase it.
Cheers.
Ben