LMS no longer plays Windows Media files

I'm running LMS 7.7.5 on a Windows 7 desktop. I recently found that WMA files will no longer play, even though they previously did on this PC and a different one I had running Linux. In Settings>Advanced>File Types, it shows that Windows Media files are enabled (drop down indicates Native). I run PiCorePlayer on a couple of Raspberry Pi's and Squeezelite on the same Windows machine that LMS runs on. WMA files won't run on any player, but MP3s run fine.

I'm not sure what else to do to troubleshoot this. Any thoughts?

Jim