Well I wouldn't get rid of LW 4.8.1 in a hurry if I were you. I think it is a very good version. Some of the LW 4.9 versions have been a little buggy & also behave a little differently. There's been reports 4.10 may have a couple of bugs also. But if LW 4.8.1 isn't working, then we should look at why. You don't suppose the school has brought in filters to stop p2p sharing do you? It's (shaping or filtering or blocking) been or is being introduced to most schools nowadays. Did you try those options I suggested in my previous post?

As far as Pro goes, the site's Pro support pages are temporarily offline at present. It may take a few days before it gets fixed, I don't know. But once 6 mths of pro support has finished, your email will be removed from their database. It's automated. You're free to downld the Basic version & use that. http://www.limewire.com/english/content/download.shtml