I'm not fuly understanding our problem. Is it that you can't see file type options or is it the advanced search options. For the 1st you can drag the (resize) sections of your LW interface. This can be done using the little arrows that separate each section of the interface OR go to bottom right corner of LW & drag LW out so it's larger. If this is not the problem please supply more details. Which OS are you using?

Don't forget for searches you need to press the keyword button at bottom left of search window. Also go to View on menu bar & make sure none of your options is hidden.