<string><html><body><h1>Upgrade is required</h1><p>MultiMC now supports old Minecraft versions and all the required features in the new (OneSix) instance format. As a consequence, the old (Legacy) format has been entirely disabled and old instances need to be upgraded.</p><p>The upgrade will create a new instance with the same contents as the current one, in the new format. The original instance will remain untouched, in case anything goes wrong in the process.</p><p>Please report any issues on our <a href="https://github.com/MultiMC/Launcher/issues">github issues page</a>.</p><p>There is also a <a href="https://discord.gg/GtPmv93">discord channel for testing here</a>.</p></body></html></string>