new version not as anticipated
 

When I'm using previous version of limewire(4.12.6) and when I search for files, I get pretty good results. Then when I download, it actually downloads 60% of the time. But in the new limewire(4.12.11), I get a lots of result but I can't download almost anything! Usually the REALLY small files work. It seems that it always needs more sources! Someone please help!

If you're sure it's not a fake files issue
Fake files showing up in search results

Delete LW's preferences folder when LW's properly closed. See point 3 below (also point 2, if you've used much older versions of LW in the past). This will kill all of your settings within options, you'll have to go back through afterwards & reset things back to the way you like them;)
Fixes for LimeWire