I had crashing issue on my h90 control app as well with windows 11 when going to the preset library and scrolling down through the list fast it would exit each time, however please get a hold of eventide support and they will help you! They helped me and I no longer have the crash.
I am also getting the same. H90 Control either does not connect saying ‘Connection Timeout’ or crashes when moving through the programme list. Please advise.
When I have had Connection Timeout messages, I have solved the problem by rebooting my H90. Restated, the problem seemed to be that my H90 wasn’t responding to the Control App. One silver lining is that my H90 seems to remember exactly where I was every second; so I could continue on after reboot without other trouble.