Read the change log! Very important if you are going to update!!
Code (Text):
/**
* Change log (9.0)
* <p>
* Removed support for Minecraft versions older than 1.13 due to the simple reason
* that those are very old and not many people use them anymore, according to bStats.
* If you wish to continue using those old versions, DO NOT UPDATE.
* <p>
* Added a generic message for when blocked commands do not have a specified message
* in the configuration file. This has a setting that you can enable/disable this feature.
* The default setting for this setting is "true". This feature also has support for list messages
* like any other message in this plugin.
* <p>
* Cleaned up descriptions in the configuration file that has been there for years and
* misleading to some users.
*
* This plugin is now mostly future-proof.
* YOU WILL HAVE TO BACKUP YOUR CONFIG FILE AND LET THE PLUGIN REGENERATE A NEW ONE.
* THEN COPY / PASTE YOUR MESSAGES AND COMMANDS OVER
* Sorry for the inconvenience.
*/