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How do I roll LRCC2015.6 back to LRCC2015.5? Do I need to install LRCC2015.0

Joined
Jun 20, 2009
Messages
15,207
Location
Houston, TX USA
Lightroom Experience
Power User
Lightroom Version
Classic
I don't know if my problems are related to new iMac hardware (5K retina), OS X 10.11.5 or LRCC 2015.6? The problems started when all came together at the same time. My LR secondary display shows often with one the second window showing on the second display AND a duplicate of this window hoping up and overlaying the Primary LR screen. Closing the popup kills both it and the window on the secondary display.
LR screen regeneration is spastic and slow. LR Develop will consume CPU until the whole OS is lethargic and eventually LR becomes unresponsive. If I expand the Primary screen to Full screen (Using the OS X green button) LR refuses to return fullscreen control to the OS and I am forced to use the Menu (not the shortcut key (F). to get LR back to a small window again.

I want to roll back to LRCC2015.5 to see if any of these issues are related to the 5K hardware or the latest rev of OS X. If I have to install LRCC 2015.0, where is it and where can I find a copy of LRCC2015.5?
 
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