I downloaded trial version of Lightroom 5.7 into my iMac, and in the meantime I purchased it, so that I got a serial number; while at the very beginning, it asked me to input the serial number, now it doesn't happen anymore.
By the way, now the develop module is locked, with a notice which says to restart Lightroom to reach Creative Cloud (which I don't use at all ...), but once done that nothing changes.
It's a very annoying situatiion, I can't use a program I already spent some money for ... too bad
Any help will be very appreciated
There are two versions of LR, a cloud-licensed version and a serial-number-licensed version.
It sounds like you’ve installed the cloud one which Adobe makes very easy to do, hoping you’ll signup for the cloud.
Assuming you have a serial-number from your purchase, you should uninstall the cloud-licensed LR trial, and then install the serial-number-licensed version from the Adobe Updates page and input the serial number:
Thank you so much for your indispensable help.
New version downloaded and installed with the serioal number I have, everything works fine.