Navigon 1.3 - full UK postcodes but no street numbers?

I've just installed Navigon 1.3 and while it is useful to have the full 7 digit UK postcodes, there doesn't seem to be any way of entering the house number to complete the address. Or am I missing something?

Thanks. I had a look on their Facebook site (what an infantile way for a company to provide advice/feedback/support for customers!) but didn't see that.