As of today, I guess all old launchers will spam this with red letters:
I'd like to update since performance improvements in MC is most welcome.
I could give it a shot but I'm afraid it would screw up mods and my environment etc. It would take dozens of hours to reinstall and fix everything, if it can be reverted.
You are running on an old version of Java. Please consider using the new Minecraft installer which doesn't require Java, as it may make your game faster.
I'd like to update since performance improvements in MC is most welcome.
I could give it a shot but I'm afraid it would screw up mods and my environment etc. It would take dozens of hours to reinstall and fix everything, if it can be reverted.