Admin button Greyed Out

It seems I encounter similar issue like -

UAC did not turn off and not run as administrator.

The button is clickable originally. What I did is to customize the toolbar, I just change it to a menu button and append other button into it. I did not restart the Opus, just apply my customization. Then the button just greyed out.

I tried change it back to normal button, or duplicate a new one. But it is still disable.

What command does the button run now? (When in customize mode, right-click the button itself, not anything inside its menu, and choose Edit.)

The command is the original one - "Set ADMIN=Toggle"

Thanks, that looks correct at least.

What happens if you go to C:\Program Files and try to create a folder? Does it get created straight away, or is there a UAC prompt or an error?

I can create folder in C:\Program Files , so it means it is already prmoted ?

It means Opus is already elevated, or UAC is disabled.