Jim,
I tried everything on the wiki page, but nothing works. Bottom line is that JRiver does not recognize the MC registration code that was sent to me when I upgraded to MC24 from MC23. JRiver doesn't even seem to have the registration code on record that it sent me via email after I purchased the upgrade, because when I request the registration code again you send me the registration codes for earlier versions of Media Center that I purchased, but not for MC24. You seem to have completely lost the registration code that was sent to me, or I was sent an incorrect registration code the first time around. My credit card was debited for the license purchase so it's all paid for. Is there any way I can share the registration code I received and/or my email address with you so you can check and confirm that everything is ok from your end? I also notice that I'm actually in the wrong forum here since I'm a MAC user, but I downloaded the lastest MAC version (24.0.45) from the link on the download page. Thank you for your help and your swift responsiveness, much appreciated!