I'm having a serious problem where no version of Unity will open. This started happening immediately after I updated Unity Hub to version 2.2.0. One time I got to a splash screen which said something about invalid machine identification for this license, but all buttons except quit were grayed out. After that when I try to open any project via the hub it will close the hub, show the loading screen for a while but then it disappears and unity hub reopens. Closing unity hub and trying to start an editor from the exe just opens unity hub and nothing else. I have tried returning my license from unity hub, revoking it from my account page, then reassigning it back and reactivating it from the hub. I am not getting any errors there, the license activates fine. I have also tried reinstalling Unity Hub and deleting Unity_lic.ulf from C:\ProgramData\Unity as suggested elsewhere.