That's some bad, but not unexpected news about there being no speaker or microphone on the IP391W 2013. Oh, well.
As far as I know I did indeed delete the 32-bit (v.220.127.116.11 [A]) plug-ins totally. It was the "IPCPlugPlayer.dll" that showed up twice on my system (In C:\Windows\ and C:\Windows\SysWOW64\). Both of those files at the 2 locations now report that they are indeed version 18.104.22.168, but as I said, Internet Explorer reports that they are 32-bit add-ons and NOT 32 & 64-bit
) add-ons. I don't know if that would be a problem though since it seems as though I have 32-bit things there that work just fine, such as Adobe Acrobat (pdf) Reader.
All of this is moot though since I no longer need IE10, since I have no microphone or speaker to access anyway. That isn't any fault of anyone at Tenvis, but right now I'm awfully mad at the people over at DX.com who wrongly indicated on their website that the camera did have audio input and output built-in, when in fact that it doesn't.
Thanks for trying to fix my problem of no video in IE10. Unfortunately, I still can't get it to work, but on the bright side I no longer have any need for Internet Explorer to get at the cameras output.