Mark, that might have worked while I still had a working copy of 2024 Pro. But, as I said in the OG post, I deleted the version I'd originally installed, and now it won't let me reinstall. When I try to do so, the Installer runs and then ends by giving me the error message I shared.
The only working version of CB I can currently run is 2022, and it won't let me change the registration number using the procedure you outlined.
So, still no go.