If a zone is not defined in your registry, the dropdown list will show an empty value as the selected item.
If your registry does not contain the key \HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\Security\TrustManager\PromptingLevel, the application will display a warning. You can still use it to create the registry entries.
The trust prompt settings have no effect on already installed ClickOnce applications (and on their updates).
Administrator privileges are required to run this application (as it accesses the registry). This free Trust Prompt Tool is provided “as is” without warranty of any kind. We recommend always making a backup of the registry before modifying it.
So far we have successfully tested our Trust Prompt Tool with the following operating systems:
Windows 10 x64 (Pro, version 1803)
Windows 10 Enterprise 1703-1903 (user-submitted)
Windows 7 x86 (Enterprise, version 6.1)
Windows 7 x64 (Ultimate, version 6.1)
Please leave a comment should you experience any issues with our software. For support concerning Windows, trust prompt behavior and ClickOnce applications in general, please contact Microsoft.