It is fixed! Wish I knew what happened to fix it though. Here is my history...
Have a 2 year old laptop with Office Home and Business 2021. I bought a new desktop and never installed 2021. I signed in to my MS account on the new desktop and bought Office Home and Business 2024, downloaded and installed it. Somehow, it always opened as 2021.
I spent about 7 hours on chat and phone calls and never could get a fix. I've installed, uninstalled, deleted registry, deleted keys via the cscript command, tried different install versions, even offline version. It never would get fixed. The last agent after working with me for 3 hours said he would escalate to the Office Team because he felt there must be a bug in the system. He said they would contact me with a fix. I was never contacted.
In the meantime about a week had passed, I ordered a new 2TB SSD for my desktop. It arrived. I cloned the 1 TB SSD that came with the desktop and switched the BIOS to boot from the new SSD. When I opened Word it showed up as 2024! As did all the other Office apps! I doubt the new cloned drive fixed it. I gut feel believe the Office Team found the bug which may have been some kind of issue with the licenses in my MS account and fixed it. Who knows? Bottom line, it is working.
Except I didn't have the desktop version of Outlook that was supposed to be included in this package. Another hour with MS Help and I got that resolved. I tried to use the "new" Outlook that was installed initially but it is useless.