click them either the vertical or horizontal one. There will be ones (I think) for both horiz & vertical sections. So ... if you're only seeing one window the arrows will either be at the very top or bottom.

Another alternative is to delete your LW preferences folder whilst LW is closed: Try deleting your LW Preferences folder whilst LW is closed; instructions here: Fixes for Limewire After opening things will or should be back to normal.