big problem with main window not appearing
 

limewire was working only yesterday but now when i try to open it everything seems alright, the loading screen appears followed by the window asking if i want to go pro but then the limewire window never appears. my cousin shut down last time i successfully used limewire so he might have messed something up. How do i get the window back? thanks very much

More info: Mac version, LW version, etc etc.