set "Whole world" as default wherever you can... I don't like selecting it every time
I agree it would be helpful--also to remember the last base airport. Could be easily done with a cookie. If you are based on the edge of a continent, mainly those in Europe/Africa/Asia like Greece/Egypt/Turkey then you are always changing it.
Already a feature request: http://www.airwaysim.com/forum/index.php/topic,48470.0.html
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