So occasionally I would like to scan if say a player has a specific NBT tag like an item or how many health they have. The problem is I need this to be server wide and if I type @a it just won't work at all, it outputs that selector allows more than one. Can you help?
To download the other ones you need to make a folder in the versions folder for minecraft and put the client and JSON file for the versions in there. They all need to be named the same aside from file extensions. Once you do that, you will be able to choose that version when making a new profile with the minecraft launcher.