Hi there Karl, thinking about this, perhaps the easiest method is to actually re-run the quickstart script somewhere else, and let it generate some new certs. Then, take their base64 encoded Env variables and replace your existing ones with the new. There is also some info in this thread: Certificates of openBalena
As for sharing the Certs, I am not 100% certain if that will cause any issues as I have not tried it myself. If you have a test environment setup you could certainly give it a try and see what happens!