i have the same problem too, i unstalled my limewire then re-download it.
it still didn't work i've been getting the same error over and over. plus on my task bar i can't see my icons on the right corner where the time is.
i've been at for hours and i can't fixed the problem. anyone help us?

LimeWire version 4.16.6
Java version 1.6.0_05 from Sun Microsystems Inc.
Windows XP v. 5.1 on x86
Free/total memory: 31410456/33357824
com.limegroup.gnutella.gui.GUILoader$StartupFailed Exception: .\lib\hashes (The system cannot find the file specified)
at com.limegroup.gnutella.gui.GUILoader.sanityCheck(G UILoader.java:286)
at com.limegroup.gnutella.gui.GUILoader.load(GUILoade r.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.limegroup.gnutella.gui.Main.main(Main.java:44)
STARTUP ERROR!