Hello!
It's been long a journey, but the 2.0 rewrite is finally here, there are many changes:

• Rewrote the game mode from the ground up
• New, even more powerful API (more info about how to use it coming soon)
• New Arena configuration file structure (old Arena configuration files are not compatible)
• New Perks
• Boon Totems
• Lunge Attack: After the Killer presses the right mouse button, Lunge Mode activates. During this time period the Killer has increased movement speed and increased range (regular Minecraft attack range), however, no objects must be in between the Survivor and the Killer. If the Killer does not hit anyone during this 1 second, it automatically counts as a missed attack with a longer cooldown period.
• Quick Attack's (old regular attack) range decreased
• New Status Effects
• New Survivor Health State 'Deep Wounds': In this State, the Survivor must mend themselves by pressing the right mouse button before the timer runs out. (Timer is the hunger bar) If they fail to do so, they end up in the Dying state.
• 100% language customization for players
• Vault plugin integration: If enabled, players can earn server currency by playing Trials as the points they collect are exchanged for server currency. Exchange rate can be modified.
• Parallel load during server initialization: By leveraging multiple cores, Dead by Moonlight loads faster than before
• Better Auras
• Removed database and statistics related features
• Removed Urban Evasion Perk (RIP, no one will miss you)
• Removed forceful plugin reload, the only way to safely reload now is to restart the server
• Updated old Perks to reflect their current state in Dead by Daylight
• Added lobby scoreboard to see who is ready and who is unready
• Added Perk cache, which remembers the Perks each player used and automatically equips them (Perk Cache is cleared upon player disconnection and server shutdown)
• Added player onboarding system, which is designed to help new players learn the game rules
• Added handbooks for each role which contains important information about the game rules
• Added many new "title" messages to help players see the health state changes
• Improved in-game scoreboard
• Added a progress bar to the Items' description
• Added automatic language update system, which will copy new texts to every language file, and delete unused ones. Changes are not handled yet, so text modification is not automatically updated.
• Maybe more things that I forgot

How to migrate:
Delete everything related from the old 1.X version.
Old Arenas are not compatible, you must re-create the Arenas in-game.