No double click for full screen video and no drag and drop support. (unless i'm blind and I cannot find the setting that fixes this)
Also, especially on slower machines, the entire gui is slowish. On a fast machine it kinda passes unnoticed but on my 9500T using the iGPU it is very sluggish.
When a video is playing, if you resize JRiver the gui becomes white. Screenshot attached.
My fast machine has an 10900k the other an 9500T. Both cpus use the same iGPU, GT2 630.
If anything is playing and you close JRiver it takes a few seconds to respond/close, why ? ( I Also think this happens on windows.. )