Just updated to the latest version Update No 16.5 with a complete reinstall and started a new career "Happy Days".
For some reason with each update, Speech Recognition will not work for one thing or another. The SHSpeechEngineTest.exe is working fine, but the program will not activate when selected ingame. I've been searching through the files to try to find the problem by have had no joy yet.
EDIT.
Been swapping files etc and now everything works...tried to undo what I've done to isolate the problem again but can't seem to get it to break again...