Hmm. Yes, latest MC and it works in Chrome, but the directory where widevine is installed seems to be different. A search for "widevine" came up with the following:
c:\Users\John\AppData\Local\Google\Chrome\User Data\Default\File System\Plugins\000\application_x-ppapi-widevine-cdm
c:\Users\John\AppData\Local\Google\Chrome\User Data\WidevineCDM
c:\Program Files (x86)\Google\Chrome\Application\48.0.2564.116\widevinecdmadapter.dll
c:\Program Files (x86)\Google\Chrome\Application\49.0.2623.87\widevinecdmadapter.dll
c:\Users\John\AppData\Local\Google\Chrome\User Data\WidevineCDM\1.4.8.866\_platform_specific\win_x86\widevinecdm.dll
c:\Users\John\AppData\Local\Google\Chrome\User Data\WidevineCDM\1.4.8.866\_platform_specific\win_x86\widevinecdmadapter.dll
c:\Users\John\AppData\Roaming\J River\Media Center 21\Plugins\chromium\widevinecdmadapter.dll
As where widevine is installed is apparently beyond my control, Netflix in MC still seems to be out of the question for me. Quite honestly, not being able to go full screen would probably annoy me too much anyway...