Airplay icon missing from iTunes on PC


Hello:  I know this is old school, but I have an extensive music library on iTunes which resides on my PC.  Up until a few days ago I was able t stream to my Marantz CR610.  And then the AirPlay icon vanished.  Have tried every fix possible from other communities / Apple (non-support).  Anyone have an idea of what to do?  My music is being held hostage...

Thanks,

mrgeo
mrgeo
Hey there:  Thanks for taking the time to reply.

I have uninstalled and reinstalled iTunes.  When I tried the previous version iTunes could not read my library.  Also did as suggested on the Apple forum and unchecked the V6 in the file sharing, that did nothing.  I don't have Wi-Fi on the Marantz of my PC.  I am stumped.  Any other ideas/suggestions will be appreciated.

mrgeo