I also want to note, that I am translating XenForo to my language and I want to make sure I am not going to loose the translation with upgrading to the newest version. So what to do to make it smooth and succesful? Should I export .xml language file before I do that? I doubt it, as I guess there will be new phrases in RC 2 and that just won't work for a higher XF version.
Thanks in advance for your help.