This is the response from r4i-dshc:
"R4i V1.4 can not work with DSI V1.44/1.43/1.4.2/1.41. You will probably need a new R4i, because the firmware & hardware were changed, R4i V1.4 can not be upgraded to V1.4.4 and we have stopped the work. We regret for the inconvenience caused to you but it's...