You should delete/update the config to run this version (changes below)!

Welcome to v2.14, this update comes with new additions and the future base for WorldGuard region support

Changelog:

• Fixed an issue with sprinting detection: when using the "standard" mode, some times the sprinting status of a player was not detected in 1.15.2+ servers. This will result in more accurate detection and a smoother knockback during combat.
• Added the option to disable combo mode in specific worlds!
• Added "height-control" module in combo mode: This allows users to specify a maximum height for the players in combo mode to prevent them to get too high.
• /kbm is now a valid alias for KnockbackMaster commands.
• Minor performance improvements
• Fixed a rare compatibility issue that was present with old versions of NoCheatPlus that flagged some false-positives about knockback (fly/movement check)

New config: gist.github.com
What is changed (see last revision): gist.github.com