Justifying items in lix: beamer

Hi When I try to justify paragraphs in the itemized list, the option configuration paragraphs does not allow me. Could you help me how to do it? Greetings Adrián

About MikTex 2.9: Upgrade

Hi My name is Adrián Díaz and I have just installed LyX with LyX-230-Bundle-005.exe. It is ok, but in your web page recommend update MikTex. Could you tell me how i can do the upgrade it? Greetings Adrián Díaz