The latest version of Microsoft Threat Modeling Tool (TMT) is now available in general availability (GA).
If you were using the preview, you will be prompted to upgrade – NOTE it will mandatory to upgrade after Oct 15th. The 2016 version is still supported until Oct 1st, 2019.
If you want to start using the tool go there.
For those who do not know what MTM is, this is a tool to help identify and mitigate security issues for developers/software architect.
The tool covers lot of potential security issues, from spoofing to elevation of privilege, or information disclosure.
To know more about the tool you can go there.