thetravhi

Yes, the problem is the Launcher.  If you quit it, it will never open again.

JoMoJoJo, are you saying that if I turn off my wifi and start the game, I won't have a problem?

I am having the same problem.  If I delete the app and the Application Support (Minecraft) folder, I can reinstall and the launcher will work.  However, if I quit the Launcher it will never open again. It doesn't matter if I use 1.18, 1.17, 1.16, or 1.15, it will never open again and all data is lost.

My temporary solution is installed 1.15.2 and when I play it, I never quit. I just leave it open in the background.  

Please, Mojang, fix this problem you created.  I don't need the launcher, just let me play the old software on its own.

Thank you.