Kden live window freezes and does not respond?
I don't know much about Kden Live specifically, but a lot of times loading freezes are related to issues with either plugins or codecs.  If you just installed it, the most likely problem is probably an issue with codecs not loading.  Without a startup log though it's not really possible to give a better guess as to what is going on (and I'm not sure how you get that from Kden.)