A tiny annoyance -
After you first get into SQlNav, and open a SQL Editor window, then open the Search Knowledge Xpert (either by ctrl-K or clicking on the toolbar icon), the focus is not on the dialog box. You have to click in the dialog box before you can type in your search criteria. After you do this once, it seems to be okay until you close down SqlNav.
Also, the toolbar icon is difference between the one on the SQL Editor window and the one in the Functions Toolbar.