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After installing 8177, my first attempt to launch the toolset triggered Avast into a 15 second quick scan. It passed OK, but on using Build > Test Module, once the toolset minimised, the game didn't start. The toolset icon was still visible in the tray but unresponsive. Starting Task Manager launched the game. All normal after that.
IIRC this has happened with other new releases.
Not sure whether this is a bug or an AV issue.