Hi all - just wanted to share something i noticed after the 3.5 update: if a midi program assignment is done while the helix (LT in my case) is connected and HD edit is open, it does not save. In my case i needed instant messages to switch my amp channel with snapshot changes.
The only way to do it and for it to save is directly in the helix with HD edit closed. Otherwise it goes away as soon as you close command center.