Are you talking about Lightroom 6, or some earlier version?
If Lightroom 6, I believe the Adobe Creative Cloud application is indeed the one you want. It won't turn you into a Creative Cloud subscriber; you will still use Lightroom 6, and this is Adobe's way of making sure that you have installed and activated your license on at most 2 computers.
Thanks for your response. But how does it work?
When I click on the download button Creative Cloud starts downloading.
Then it's on my desktop, and the only thing I can do is clicking it, but nothing happens.
It just reinstall again.
Do you know what to do with it.
Or better still, can you help me to het Lightroomit working again?
Thanks in advance.
After you install it once, there should be an application on your computer (which on Windows would be Start->All programs->Adobe Creative Cloud or something like that), which you can launch, and then follow these instructions: How to convert a Lightroom CC trial to Lightroom 6
In fact, it probably was there the entire time, you shouldn't have to download it.