That client manager is a complete failure of concept. It's an external add-on linking to the server with its own protocol. The server has no way of telling it apart from something imitating that protocol and sending that everything is just fine.
Face it, any kind of client-side protection is at best an attempt at making it too much of an effort to circumvent, and you've as good as lost that battle to begin with by needing to provide access to the client software in the first place.
The only way to make something like that work is to have OS support for segregated data where nothing can access your memory space or even physical data files. About the only way to currently even attempt something like that is to basically install the equivalent of a virus.
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