I bought Lightroom 6 via download from Adobe some years back. My computer died and I go a new one but can't figure out how to get Lightroom 6 on my new computer from the Adobe website, even though I have the license key. Have they really made this impossible? I know that they have switched to a license only model, but I though I owned Lightroom 6 forever. If it can't be retrieved, are there any alternative raw converters that don't require paying $10 a month for the rest of my life?
In addition to what John has already advised, you need to be aware of the following.
Yes you do own the license Key for the software, the challenge is to setup your computer hardware to install and run the software.
If you installed the software previously you would have registered the license key in you Adobe ID. The license restricts you to have it installed and activated on two computers at any point in time.
Installation and activation de-activation needs connection to the internet. If there are already two activations you will need to de-activate one.
It’s best to begin by logging in to your Adobe account. It will be connected to you e-mail used to create the initial registration. Good luck. The last update was done in Dec 2017.