I understand that upgrading only goes for paid products, but the offer I got in the email also talks about buying your first licensed JRiver MediaCenter v22 by buying a license for v22, which would also give the right for a cost free upgrade to the v23 when it comes out. So, I was talking about such a paid license of $15.98 for JRiver Media Center for Linux (as is mentioned in the offer under 'Get the Best of Both Worlds') and not about the free JRiver MediaJukebox I'm using on Windows at the moment.
Here's the full text of the offer...
Special Pre-order Prices Still Available
JRiver's pre-order upgrade special has been extended for a few days. You can still take advantage of the best price of the year. It's $15.98 to upgrade from any previous version of MC, all the way back to Media Center 11! That's 40% off the regular upgrade price.
You can also upgrade a Windows or Mac license to a Master License which works with both. That's $22.98 now.
Upgrade Now
To get the special upgrade price, pre-order by May 14:
Direct Link to Windows Upgrade $15.98
Direct Link to Mac Upgrade $15.98
Direct Link to Master License Upgrade $22.98 (works on Windows, Mac, and Linux)
Need to know more? Please read Upgrade Help .
Get the Best of Both Worlds
You can purchase MC22 now and get our most mature and stable version. If you have never purchased MC, just download and purchase MC22. You will receive an MC23 license that works with both versions. When MC23 is available (this summer), you can just download and install it. It works with the same License and uses your same data.