I believe this is the first release of Calyx that lets you re-lock it. You couldn't on the older ones. I was running the old one right up until the new one released.
I think general advice is only lock it at the end of installation process to avoid problems (at least that's what I think I read months ago). You will leave a security hole open by not locking it.
I noticed some of the documentation on the Calyx site hasn't been updated to reflect changes in the new release. I'd prioritise info from the installer pages and processes over most other info on the site at the moment.