Significant changes were made to settings.yml and messages.yml. You MUST update these files, or you will be GUARANTEED to be slammed with the plugin almost completely malfunctioning.
This update was partly tested. I do not have enough time to fully test it. If you are skeptical about your commands' security, I would recommend you test this version before you deploy it.
Changelog: Now priority-list based! (lokka30)
Finally, you can simultaneously allow and block commands by using priority-based lists!
As suggested by @DozerCraft, you can also specify deny messages for each group if you wish to override the default one.
This system has overhauled a lot of the code previously in CommandDefender, which explains the big jump in the version.
Multi-line messages! (lokka30)
All messages now have multi-line support!
Force-block and force-allow permissions! (lokka30)
For those who wanted to block and allow commands based on permissions, that's now possible!
And more...
I am testing a new versioning system. I will use 'build' versioning whilst coding (hence b22), and 'x.x.x' versioning for releases to make it easy for server owners.
Unfortunately I didn't write a changelog whilst developing this update, so a bunch of minor things were done to the plugin but I didn't note them down.