How to deactivate a license after having deleted the product?

I had problems with a computer recently purchased and the store replaced it with a new one. The problem is that Studio Trados 2014 had been installed on the first computer and in the rush of returning it for replacement, I deleted the Trados product without deactivating the license beforehand. How can I now deactivate the license now that I no longer have access to the computer and the product?