[CWB] erase corpus from the system

[Josep Roderic Guzmán Pitarch]

I wonder if someone could help me with this problem. I have already 
installed a corpus on the system, but I have detected some errors in the 
corpus. How can I erase a corpus existing on the system? Working with 
cqp it was very simple, you have only to erase it from the registry. But 
I do not know exactly, what to do it with cqpweb.
Thanks
Jguzman