I downloaded the file and installed it, and no update to 4.2. I then checked the file that you linked and it's the same version: Luminar 220.127.116.1143 offline setup Seems it shouldn't be this difficult.
Same issue: "I'm running 4.4.1 on a Windows 10 machine. When I go to Check for Updates, it tells me I'm running the latest version. Is there some other option to get a link to the update?"