Hehe, you said it right there in your initial post…. 
I seem to recall reading a similar post in the last few weeks with a similar issue regarding lack of sound after the update. I could not tell you what thread, but possibly worth having a search.
Personally I would check the sims is set to use the default windows sound device. Once you have switched to VR in the sim I would then drop back to the Windows desktop to check what current speakers are being used. Do this by clicking on the speaker icon on the task bar then review the playback/speaker devices. I think the G2 speakers/headset is identified as a USB2 device if that helps. It might be worth switching device there to see if the sound returns. If not maybe review the settings for the G2 itself.
Hope this helps.