De-Activating unused computer

I recently replaced my boot drive and reinstalled Windows as well as ALL my software. Topaz has the names of both machines, and I claimed the seat on the new drive. Topaz is presently NOT working at all , as I cannot drag any files into the window, and Topaz does not even see any JPG files. I suspect that Topaz is not authorized on the new Windows drive. How do I remove the old computer which no longer exists?