I am moving this to the Lightroom forum so that the experts there can assist you. It would be helpful if you could give a little more information about your problem. Can you indicate the OS you use, any error messages, or specifically what you did just before experiencing issues?
If you still wish to purchase an upgrade to the stand alone Lightroom program, please see this link: Products .
Scroll down to lightroom and click "buy". You are then given a choice of Lightroom 6 or the Creative Cloud Photography plan. Click buy now under the Lightroom 6 option. Click on the selectable text by " I want to: "and select "upgrade". You will be asked to enter the product you are upgrading from. To launch the product, you will need both the previous and the new serial numbers.
If you are a Lightroom CC subscriber, you can't go back to LR 6 because you haven't purchased Lightroom 6.
You can roll back LR CC to an earlier version that seems to be more stable.
Mac Book pro, OS Yosemite. No changes have been made to the operating system. I am a hobby photographer, so it is not overwhelmed with data either. The severe trouble started 3 days ago, but it has been slow since I upgraded.
I am receiving no error messages. It simply takes over 30 minutes to load only a few photos. If I quit the program, I can restart it and and try several more times, but it should not refuse to respond. Once I'm in the develop module, it's a little laggy, but not nearly as bad as the library module. Even clicking and dragging photos into collections is not working.
I would hate to have to purchase LR6, only for the bugs to get fixed on CC just in time. I am now out of the trial period, so I am hooked for at least six months on creative cloud, and still can't use the program. It's an awesome idea, and I wanted to work so badly! I can't imagine the frustration of professional photographers who need this program to work regularly for hours on end, on a daily basis.
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would hate to have to purchase LR6, only for the bugs to get fixed on CC just in time.
You don't need to purchase LR 6 (the perpetual license, standalone version). Just revert back from CC 2015.2.1 to CC 2015.1.1, as described in the article dj_paige provided: http://www.lightroomqueen.com/how-do-i-roll-back-to-lightroom-2015-1-1-or-lightroom-6-1-1/. Of all the releases of CC 2015, 2015.1.1 has been stable for the most people, with the fewest bugs. Later, when 2015.3 comes out (rumored to be soon), patiently wait a few weeks to let others do the beta testing before letting the Creative Cloud app do the update.
Lightroom 6.3/CC 2015.3 is now available -- try updating to that version which includes the previous import functionality, bug fixes, and new camera/lens profile support: Lightroom CC 2015.3 / 6.3 now available