From David

Q: Why do I need to keep loading country databases?  Can they all be loaded at once?  My system has plenty of memory.

A: The different country databases resolve the problems of wineries of the same name (but different entities) existing in different countries. An example of this is Taylors in Australia - which is known as Wakefield in the USA because of Taylors in Napa Valley.

When adding wines, simply selecting the country from the country field will do this for you - which also loads the drop-downs from the list of wineries and regions etc to appropriate values. Once in your cellar, the country is looked after for you without any further intervention.