I have lightroom 5.7 installed on my laptop. I have multiple licenses fro lightroom 6 which is installed on my desktop. How do I upgrade my laptop to lightroom 6?
The answer depends on your laptop. What OS and version are you running on the laptop? Lightroom 6 and above will only run on 64 bit systems. If your laptop is running a 32 bit OS, you will not be able to upgrade past 5.7.
If you are in fact running a 64 bit OS, you can find the direct download links for LR 6 and the updates (it is up to 6.4 now) from this page: