Hi, windows has updated itself to 8.1 and now i cant open lr,
a message comes up and says "the light room catolog named Lightroom 5 Catolog cannot be opened because another application already has it opened"
quit the other copy before trying to launch.
I've tried but nothing works and its driving my mad.
if any one can point me in the right direction of what to do i'd most appricate it.
LR 5.7 works fine on Windows 8.1. To solve your problem, navigate to your LR catalog folder, find a file with extension .lock and delete it.
Thank you so much, tried it last night and it worked a treat. I would never have known that. Thank you