You can import midi-files by either dragging them to the bar field as below, or by going to "menu" "Song track" "import midi file"
Chose what you want to have. I chose both left & right.
Humanize option...
And you can (inside DAW) go to "menu" and chose "enable midi output" so you can get other instruments react to EZKeys.
When you hit play in EZKeys the sound of the other instrument will be heard. You need to chose EZKeys as input of that instrument of course.
All written in manual...