You say you are having issues with ACR 4.6 but then state your ACR version is 126.96.36.199? Really? If you have ACR 4.6.x correctly loaded, the ACR version should be 4.6.x (I don't remember what the LAST version of ACR was–version number-wise).
If you can't access Bridge's prefs, you have more significant issues that can be addressed here...note that a PSD file in Bridge depends fisrt on the embedded preview and then is rendered after Bridge parses the actual preview...
I think you need to do some basic Photoshop/Camera Raw/Bridge troubleshooting to get things up to speed.
You're absolutely right, it should show as 4.6, and it does. My error. The initial inquiry should have read, 188.8.131.52 (and yes, that was the last version for PS 10.0.1).
However, you have helped me solve my problem. I changed the ACR Preferences to, "Apply sharpening: to all images" instead of "Apply sharpening: Preview images only". I'm not sure exactly what that means, but it must have been the default each time I reloaded 4.6. Or perhaps I changed that without remembering, preventing the developed ACR version being applied to the psd.
I have no idea why Bridge Prefs crash as soon as I select them in the menu. Camera Raw Prefs accessed from Bridge don't crash when selected. I'll try to figure that out separately.
Thanks very much for your assistance.