I've got a Lightroom 5.0 licence which came with a CD version of the software. I upgraded my laptop to Mac and the only version I could download was a CC. After the trial expired I tried to use my licence number but it was refused. I've added my licence to Adobe ID profile and it shows as valid. Unfortunately Lightroom which I have installed on my laptop doesn't take any notice of the licence, and is still in expired trial mode. Any ideas what I'm doing wrong?
Download the non-CC version from http://www.adobe.com/support/downloads/product.jsp?product=113&platform=Windows
You may need to remove the current version first (doing so won't lose your existing catalogue).