i have exactly this problem.

h90 controll 1.7.11 (Mac)

h90 firmware (software) = 1.5.6.161

I can’t see my h90 in my control application on my MacBook pro

after loading in recovery mode… I can see it, and I can connect.

but first: it asks me for a Code I don’t have, and refers to the screen of my h90 ( which is in recovery mode and doesn’t show a code)

and sometimes it does connect….. I have a midi error (not midi port h90 found)

and