Hey, I attempted to open a project in 2017.2 using Unity Hub. (Editor freshly installed through the hub). However, it would show the splash screen then instantly close. Upon launching the editor manually it asked me to activate my license for the editor, which I did. I was then able to open my projects using Unity Hub. Although I have fixed my issue, others may not if they encounter the same issue. There is clearly a license issue here between the hub and the editor installs.