I am trying to upgrade to Lightroom 5.7.1 but it won't accept my serial number for lightroom 3
The newest version is LR6 or LR CC 2015.
Are you buying 5.7.1 from another source?
Thanks, I found my answer and am buying update for LR6
still can not open upgrade for Lightroom 6 I get this message when I try. "image not recognized"
Retrieving data ...