I did my regular Restore Point, Capture every setup screen, and log all changes to the OS. I also was not able to Register the software (No REGISTER under the HELP menu).
The same program and version was offered on 2022-02-28. Both setup files have the same MD5 HASH (B464ED72 816E60FF FCC7504B 1AB762E7) so they are the same. I always capture every screen of setups, so I checked the setup steps for the 2022 install. After the installation, I did get to register the program. That install was on a different computer.
I did a System Restore for the setup, then installed the program again using the setup from 2022. Again, there was no REGISTER under HELP.
One thing is different that I have left off. The 2022 install was onto a Windows 7 Pro OS. My install today is on a Windows 10 Pro OS.
Luckily I have a Windows 7 Pro that has not had the program installed onto it previously. I was curious, so I installed the setup from todays offer, and I did get the REGISTER option.
Therefore, the difference may be that this program on Windows 7 (Pro for me) can Register the key, but not on Windows 10 (Pro or possibly any version of Windows 10).
One user reported that the installation worked fine for them but we do not know what OS it was on. That install could have been on a Windows 7 OS; we don’t know.
If anyone has a Windows 7 PC, see if it will allow you to register the software. Regardless, to help others report back what you find.