Since single-player worlds are saved in your browser's "IndexedDB," clearing your browser cache can delete your worlds. Always export your world backups from the game menu.
: Several community-hosted sites provide the full 1.7.2 client ready to play. eaglercraft 172 full
But then came the "Great Filter."
Look for versions hosted on sites like eaglercraft.com or reputable GitHub mirrors that explicitly state they are "Full" or "Offline." Since single-player worlds are saved in your browser's