in flex voice 3... when I uninstalled the tts engine, it broke my sapi5. I had to reinstall flex voice 3 then sapi5 was fixed again. I am working on fixing this bug. if you find any similar bugs with other sapi5 engines, let me know. I'll get around to fixing them. all source is on my github, so if you are able, feel free to make pull requests to fix small bugs like that if you wish.