Please let me know if and when you find a solution to your problem.
In any case, I use JRiver Media Center on my computer and listen to it a few hours every day in the morning, after work, and in the evening. I am in fact listening right now.
The problem for me is that my computer and excellent speakers are in my office, and with JRemote not working properly I cannot use JRiver on my iPad or living room stereo system. All because of an idiotic "update" that disenfranchises paying customers who had it working fine for months and months.
While I'm able to stream all music to my Samsung Smart TV (in my living room and hooked up to my amplifier and another excellent set of speakers) using a powerful router and the internal Samsung software, I lack the functionality of JRiver, i.e. accessing many Playlists that I used frequently.
JRemote 3.23 needs to be reverted back to the previous version for all iPad 5 customers.