Find in Database

I am having trouble with the ‘Find in Database’ command, when I try to select it, either in the Edit Menu or by using the designated keystrokes, nothing happens—no search window opens, nothing! Any ideas?

Use Tools > Search to open a search window. In addition, ensure that the toolbar search is visible before using Edit > Find > Find in database… (the default window width of DEVONthink Personal isn’t sufficient, this will be fixed by the next beta).

Many thanks for solving this and your very quick reply.
Cheers