Would the edits I had made in CC still be intact if opened then in LR 6?
Do you know also if I now have installed LR 5.7.1 and left it installed could I then do an upgrade to LR 6 if I was not happy with LR CC?
Thanks for your help.
Your entire catalog remains intact when your subscription to Lightroom CC expires or is ended. The catalog is completely usable in LR 6.
Yes, you can purchase LR 6 at any time that it is sold by Adobe (which should be until LR 7 comes out)
Many thanks for your helpful answers.