Hard Disk Monitoring

I recently updated to Windows 11, and since then, the main window of HDSentinal shows upon startup, even though the box is not checked (see attached screenshot of my settings).

I've tried:
1) Checking the box "Display main window when started" then rebooting. Next unchecking the box, then rebooting again. That didn't work.
2) Uninstalling and re-installing HDSentinel. That didn't work either.

Any ideas?

Do you use registered version of the software? The trial/unregistered version always shows the main window and the "trial version notification" window on startup.

I have the registered version, and it shows as registered. But is there any chance that the registration got messed up during the upgrade to Win 11?