I would strongly recommend giving the newest version a try. It is in beta right now, but we've been testing this beta for several weeks with different versions, as it's probably the most significant LimeWire release to date. It should also be the official release very soon.
There have been some installer changes, so hopefully it will work for you. It's available at:
http://www.limewire.com/index.jsp/download_beta
Let me know if this installer gives you any trouble.
Thanks, and our apologies for the inconvenience.