Sorry if this has been posted before. There are just a dizzying amount of acronyms on this board and I find it hard to sort it out. My friend purchased a NDSI. He upgraded the firmware from 1.3 to 1.4u by accident. He has the R4I from www.r4ultra.com. The website has no updates posted. Can anyone elaborate on how to get this R4I working again on 1.4u? Thanks in advance!