Added a configuration update system. If the configuration changes between released versions, a backup of the old configuration with your values is made and the new configuration is copied.

Plugin now checks if ProtocolLib is installed before attempting to start.

Plugin now has an (auto) updater courtesy of the amazing @inventivetalent . Auto downloads are disabled by default.

Fixed a bug where using the 'Pick Block' control in Creative would create a new Block in your inventory every time, instead of selecting the one that was already there. Thanks to @Asgard .

Changed a few other things, minor performance changes, removed useless code, ect. I did a good amount of testing on the latest version, but if there are any bugs, let me know.