I purchased Lightroom 6 a few months ago, downloaded and attempted to use it. I got a message pointing to my graphics card not being robust enough to run Lightroom 6 so I had to revert back to my previous version of Lightroom. This also required that I delete Lightroom 6 from the old laptop in order to run the old version. I now have a new laptop and want to download Lightroom to this new laptop and my desktop. I have the serial number for activation but can't find the method to download and install without buying a new copy. Three questions then: 1) how do I download & install on the new laptop and 2) Is it the same process to download & install on the desktop and 3) do I need to inactivate something before downloading and installing on the desktop?