That is certainly encouraging. You’re using E-RM Multiclock and Mio?
Yes, I did try different ports, and I did test that Multiclock is actually sending midi clock by connecting it to my Keystep and setting it to midi sync, and that worked.
Yes, I downloaded the latest version yesterday, before trying this.
To be clear, the actual physical usb connections are arbitrary, right? The 4 usb connections are effectively a hub and are not actually numbered. It is the midi port settings are just for internal norns protocol?