To save everybody having to waste hours trying to find the stand alone version of Lightroom 6, here is a link to the page
I'm not sure if I am going to update but I did want to find out how much it cost, I can't find if there is an upgrade price or not
Saw $149 new, and $79 upgrade to Lightroom 6 on USA website. Having watched the YouTube videos released today, I must say I'm a bit disappointed. There is still no upgrade on the UK CC site.
I found it at £103.00 for the full package nothing about upgrade at all.