For CS2 install one of the two could not be deleted it can not be used. I would like to free up, but I do not know how to apply for cancellation of registration is online?

Several years ago I purchased a CS2, use very fond of.

However, the installation is made mistakes and so have only one active opportunity.

Now that new machines are setting up, I want the other - is currently inactive - cancel installation to activate your program are two user.

Of course, I have the installation kit, but I have used.

I need help in the implementation.