How to unban someone?

hello

my moderator got banned because we testeted this anti cheat and now i cant unban him :D
he gets this msg

(Kicked: Due to your past behaviour on other servers, you aren't allowed in.)

how can i unban him from this list ?

It says in the documentation
/sa.unban "username/id" - unbans a user
i tryd that already with steam id he still getting this msg

also did 

unloaded the plugin
cleard ban.cfg file 
data files
loadet plugin

 

At this point unbanning has been disabled on the current version (Due to a security vulnerability). This can however still be accomplished via the website. 

The new version will be uploaded before the weekend is over. 

okay then i give him the whitelist stuff until update thanks :)

when is the update coming ?^^

also how to unban over the website ?

 

Please try v0.5.1 and advise.
what about my question with the website ? :D
You just login with the steamid that you provided in the config, click on servers, on the server you want to unban, then unban the player