Uninstall/ Reinstall

I've had the Limewire software for a few months. Everything was working fine until a few days ago when I clicked on a link to upgrade to a newer version of Limewire. Since then there seems to be something wrong with my save file (nothing that I finish downloading is able to be found), also the whole program is very slow and sometimes does not respond at all and I have to forcequit and start over. I don't know what I did wrong, But if there is someone there that can give me some advise or at least point me in the right direction I would really appreciate it. If there is a way I can uninstall this software altogether and pay the $18.88 to install Limewire Pro I will do it in a heartbeat, but I'm not sure if this will even solve my problem. Thank You, TJW