Thanks for clarifying. I have multiple libraries right now, one in the Mini, where I am working on the metadata and one in the NAS (and likely always will have a traveling one on the laptop/iPad and one on the NAS). When you remember how to switch libraries, let me know.
That's very cool about using JRemote in several locations at once with different sources, in this case different parts of the library. But per Awesome Donkey's suggestion in my post on MC20.0.87 crashing, I have unchecked all JRiver features except Media Network in order to test if one of those other features is causing the crashes. Once I get it stable (really hoping this suggestion will work!), I will reintroduce features one at a time until and if MC20 starts to crash again. He is very interested in knowing which feature is causing this.