: It determines if a specific UI element (skin) should only be active in the Main Hub and automatically disable itself when you switch to a Sub Hub .
If you are simply looking for a reliable way to launch Minecraft, there is no official "Main Only" version. Instead, consider these highly-rated standard launchers :
: Best for players who want detailed control over their modded instances.
In the context of the popular Blue Archive Desktop UI setup for Rainmeter, "Main Only" is a parameter used to manage skins and hubs.
: The main entrypoint is the first normal initialization to run for any Fabric-based mod. 3. General Minecraft Launchers