When you did download lately, then you probably did download LR 6 (LR CC 2015).
Since you say you have downloaded via CC - do you have a CC subscription? Do you have a standalone license? For LR5 or LR6?
Check that and let us know exactly what you have and what you want.
I have a standalone licence. Finally managed to get some help on the Chat as well who have also directed me to this source for download.
Have just uninstalled and about to re-install from download.
Download successful! Thanks P