Updated to the latest release, 1.7..., and the system will not keep user settings from old software.
Sorry to hear that. It sounds like there's something about your configuration that the 1.7 software doesn't like : could you post a copy of your configuration (or send it to me in a private message) and we can investigate?
Probably a rookie error... Had to send the old system config to the racks from the old Concert save. Then import from racks if not synced. All good now!