frank_delgado said:I've got a perpetual Topaz licence
This is why I keep saying own your tools, and even then, read what "own" means. A perpetual licence is only perpetual for as long as the company that sold it to you exists in the same form.
Your current version will keep running, almost certainly. Nobody reaches into your machine and switches it off. What you lose is everything around it: updates for new OS versions, new camera support, new models, and eventually the activation server if the product is retired. I've watched this happen to three apps I paid for over the years. One of them still runs on an old laptop I keep in a closet purely for that reason, which tells you everything.
If it's true, my advice is boring: download the installer for your current version now and keep it with your licence key, and don't buy any upgrade plans until somebody says in writing what happens to them.