FL's plugin search there's a Kontakt_2, and after some file searching i found an old version of Kontakt (6.1.1) sitting in a subfolder in my VST directory. Not entirely sure how I've missed that, but everything ...
FL's GUI. In between the errors, Newtone is functional, but keeps popping the error and randomly resizes and it's window pops to different areas onscreen. At one time, after clicking the error message, the whole FL window itself ...