2.5.5 for Mac?
 

Where do I get the upgrade? No matter how many times I check the box "upgrade" on Limewire's website, it doesn't take me to an upgrade, just to a place to download the installer for the same version of Limewire I already have? Help!

I had the same results. I went to Version Tracker and downloaded 2.5.5 from there and it works fine. Don't know why you can't get it from the Limewire home page.