Midi Guitar 3 won't open in Logic anymore

Midi Guitar 3 won’t open in Logic anymore. Says my DAW isn’t sending audio, however, you can see in picture attached that I have plenty signal.I’ve tried every combination of input and output devices. Also when I tested in standalone mode a warning that there was too much load on the CPU. And when I used midi guitar 2 in Logic it defaulted to a ridiculous and unusable Sample Rate.
This is unprecedented - it worked like a charm until today. It has been a couple of months since I used it last, butnothing has changed in my set up.

Multihreading should only be enabled for playback. Multithreading uses the large buffer setting. MG wants short buffers,