I just tried upgrading to 1.7.2 from 1.6.4 via a reliable LAN connection. No cigar. I then thought, perhaps try 1.7.0 first. No cigar. Each time the UI reported that there was some error half way through uploading the firmware.
I then had to power-cycle the Multitech Conduit to recover. This is using AEP. Any further advice? Thanks.