The product names have been changed, thus causing lots of confusion.
The current version of "Lightroom Classic CC" is 7.x, which is available by subscription only. This is the version that stores all the images locally on your computer.
"Lightroom CC" 1.x is a new web-based app that stores all the images on Adobe's servers. You probably do NOT want this version.
Version 6.x is old software and probably no longer available for sale. (Someone correct me if I am wrong.)
Certainly (from Australia) Version 6.14 is still available to buy-
All the instructions are here and Step3 indicates -How to choose the License upgrade
and the link on this page takes me to the "Products" page where Lightroom-6 is available.
When installed, check Version in Menu > Help > System Info. If you see 6.0, You may need to also download and apply the 6.14 patch update.
Thanks to both for your time. Much appreciated. Waiting for download now.