I downloaded files that won't play in WMA. Says I need a license to play the file. When I try to get a license it tells me I don't have the plug ins required. Anybody know how I can make these files work?

If any file asks you for a licence to play it when you try to play it with a player, then ignore it & get rid of it. It may even try to connect you with diallers. See What you should know about WMA Files

Other audio formats are safer: mp3, m4a, ogg, etc.

I'd recommend getting a decent player with in-built codecs such as one of these: 1. dBpowerAMP,
2. WinAmp, - 3. Quintessential (QCD), - 4. iTunes
* Good tagging tools: http://massid3lib.sourceforge.net/

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Excellent advice. Any program that wants you to download something to view or listen is trying to stick you with some form of information gathering. The exception to this would be codec's which change all the time.

Have you tried opening/viewing/listening to the file in Media Player Classic or VLC?

Do a google "I'm feeling lucky" search for them. They may be able to open the wma file without the license....but yea, generally just stay away from them...