Here are Downloads links to current releases: x64Components addon
_______ 32bit Win7codecs
Also know, it is recommended to UNINSTALL - upgrade installs are known to cause issues.
Using a current release, WMP will play the file
The format will still not be recognized but if you allow it to add the extension to the player, it will play.
I have not setup the .umx exension for WMP use; I''ll do that in the next release.