In LimeWire Help>About LimeWire ----- It will give the complete LimeWire Version and Java.

The latest official release is version 4.9.23, if that is not the version you have you can download the basic version from this link. http://www.limewire.com/english/content/download.shtml

If you have the Pro Version it can be downloaded from your personal pro page if you are still within the 6 months of free upgrades.