very mad

ok i unzip the new version and it won't install it. whenever i go to the installer i get either the little java message that everyone is talkin about or a box that says it can't find an application to open the installer. do i need to uninstall 2.5.5 and if i so will it delete all the files i already have downloaded with it? i too will never find this page again so please email me with a response if anyone knows anything about this. stratbean@aol.com

thanks alot.