Get a bigger screen? drop the font sizes a bit
I take it this is SQL Commander you are talking about? I kind of agree as its a wee bit cramped on my 15" powerbook.
At top, the database connection/database/schema selectors seem a bit redundant as they duplicate the left hand file selector choices. If the max lines/chars boxes find a new home then this gives a bit more space.
In the results window could the window switcher from bottom be replaced by a couple of icons? this would also get a bit more space.
There are also times when side by side panes might be handy.