Ok, i now can confirm why interface crash, It’s a bug !
If i use interface.exe with the htc vive. then close interface but keep HMD mode enabled and not switch back to the better desktop mode.
If you then close steamVR because it’s not needed at all. and then start interface it’s crashing ! it keeps crashing until you turn steamVR on. switch back to desktop mode. logout and shutdown steamVR.